The heritage of .30 caliber (7.62 mm) magnums can be traced back to the .30 Newton in 1913 and to the .300 H&H Magnum in 1925. [17][18][19] The 3.55 in (90.2 mm) long MK 248 MOD 1 or alike ammunition is not offered commercially, since it exceeds SAAMI standards for overall length and maximum chamber pressure. It is a great performer with the 215 and 210 Bergers and I have over 1500 rounds through my custom rifle. I know that I want it as short as possible without giving up too much in velocity or powder burn. So I'm purchasing a new barrel here soon for the first time. Need to pick a big caliber rifle and I have come down to the following options : Rifle 1. There was no power at the range so a chop box was out of the question. Weight decreased 1.82 pounds to 16.46 pounds with the 16.25 inch barrel. Hunters found the cartridge to be an effective all-around choice with bullet options ranging from the flatter shooting 165 grain to the harder hitting 200+ grain selections available from the factory. With its velocity, low bullet drop and high energy retention, the .300 Winchester Magnum is useful for hunting sheep even at extended range. Generally, the savings in length are approximately 2.5” when using a 24” barrel as opposed to the optimal 26” barrel length for the .300 Win Mag. These include my .264 Win. [12] It is particularly useful when hunting the members of the ungulate family such as elk and moose and is a popular cartridge among hunters for these class 3 game species. [3], The .300 Winchester is extremely versatile and has been adopted by a wide range of users including hunters, target shooters, military units, and law enforcement departments. Next Last. Norma 95.5 grains of H2O (6.19 ml), .300 Winchester Magnum SAAMI cartridge dimensions. 300 Winchester Magnum Load Data Case:Remington Barrel Length:24" Case Trim Length:2.610" Primer:Rem 9 1/2m Twist Rate:1:10" Bullet Weight Bullet Type Bullet SKU Bullet S.D Bullet G1 B.C Cartridge O.A.L 110gr TSX BT TAC-X 30341 30336 0.166 0.264 3.340 110gr TTSX BT TAC-TX 30362 30358 0.166 0.295 3.340 Charge Velocity Charge Velocity Powder (grains) (fps) (grains) (fps) H4350 … I selected Federal 190 grain Gold Medal ammunition for this test. ruger precision rifle 300 win mag 26" 5 shot The popular Ruger Precision Rifle is now chambered in magnum calibres .338 Lapua Magnum and .300 Winchester Magnum. as low as $165.27/mo. blog) by 20 percent. This is directly from the book "Hunter's Guide to Long Range Shooting" 20" barrels: 30-30, 32 Spl., .35 Rem. Prior to the design of the .300 Winchester Magnum there were several cartridges that provided what could be best described as a magnum level of energy. While most of the .300 Magnums are ballistically similar, far more factory loads are available for the Winchester version and only the .300 Win. The ability to zero the .300 Winchester Magnum and shoot without hold over to 270 metres (300 yd) makes the cartridge one of the flatter shooting cartridges. The Weatherby's standard length magnum case was soon noticed. Features The X-Bolt is free-floated by bedding the front and rear of the action for stability and to help maintain barrel to stock spacing for consistent accuracy. [citation needed] However, bullets weighing between 7.1–16.2 g (110–250 gr) are available to the reloader for the .300 Winchester Magnum. Mag. Both black bears[14] and grizzly bears[15] are hunted using the cartridge. Anyway, in Bullberry's .204 test, 23" yielded the fastest times. as low as $208.46/mo. The .300 Weatherby Magnum was introduced in 1944. At the range I looked at my shooting buddy and we decided to go all in and cut it to 16.25″. An authorized Blaser dealer, (570)368-3920 or shop online. The Weatherby cartridges involved blowing out (reducing the taper) of the Magnum H&H cases, bottlenecking them to the required caliber and shortening them to fit the standard rifle actions of the era. Keep in mind almost two pounds came off the muzzle end. The goal of this article is to help you determine which .300 Win Mag Rifle is best for you. Sep 1, 2014; Add bookmark #3 You could buy a 20" threaded 308. The maximum point blank range for the 12 g (180 gr) bullet is 300 yards when zeroed at 232 metres (254 yd). Federal 92.0 grains of H2O (5.96 ml) the only down … The crown was not re-cut, burrs were not removed and the gun was shot with the saw cut, as-is. This translates to about 20% greater energy advantage over the 30-06 Springfield cartridge. There has been some speculation that if the cartridge was released earlier, the dimensions of the cartridge would have matched the .30-338 Winchester wildcat cartridge. The left-folding stock hinge is attached to an AR-style buffer tube and accepts any AR-style stock. (Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives) rulings the .300 Winchester Magnum can handle up to 430.00 MPa (62,366 psi) Pmax piezo pressure. … Taken together with its performance it remains one of the most useful and popular cartridges today. Does anyone have any data on the velocity differences between a silenced .300 win mag in either barrel length, or any advice on the subject in general? UPDATE: 1/1/15, see below for 308 Winchester and 223 Remington. Mag. The .338 Lapua Mag., on the other hand, was designed from the ground up as a long-range cartridge, and was actually developed, in part, at the behest of the U.S. Army, to address penetration concerns regarding the .300 Win. Primarily offered in 250- and 300-gr. The rifle was zeroed at 100-yards and the testing began. 300 Winchester Magnums Require Standard Cartridge Length to Fit All Rifles Because bullets can vary significantly in weight and shape, they vary significantly in length. 300 Win Mag: purchasing my first barrel, need assistance! Range conditions were good for a December day in the Northeastern USA. 1.1 1. This next 300 Win Mag rifle is another highly accurate firearm with a 26-inch barrel. I have a 300 win mag Ruger magnum hunter, & its 25 1/2 with the break, & a Remington 700 in 300 that has 24" barrel no break. With the average load for the .300 Winchester Magnum, the recoil energy is roughly 30 ft lbs. The maximum point blank zero, allows a shooter to sight in his weapon at a given distance to hit a target of a given size when hold center mass. You can read about our far more practical 16.5″ 308 here: Project Guns- Gunsmithing articles and posts, Leupold Mark 6, 3-18 scope with TMR reticle, Federal Gold Medal 300 Winchester Magnum Ammunition 190 SMK, MagnettoSpeed V2 barrel mounted ballistic chronograph, 308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28″ to 16.5″), 223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friend’s rifle, Short Rifle, Long Range: Testing our 16.5″ 308 Remington 700 out to 635 yards, Remington Arms “One at a time” 1969 Manufacturing Video, Installing a SAKO extractor in a Remington 700/ Model Seven, Building a USMC M40A3: Cloning the Marine Corps Sniper Rifle from 1999-2009, Customizing a Savage Model-10 Hunting Rifle, Eliminate milling machine backlash: Splitting a Bridgeport feed screw nut, Brownells Gunsmith Conference and Career Fair, DVD Review: Tactical Pistol Operator with Paul Howe, Cerakote tip: Clean out your ejector hole before final assembly. [5], Belted, bottlenecked magnum rifle cartridge, .300 Winchester Magnum (center) flanked by its parent cartridges: the, Military and law enforcement applications, Remington Model 700 Police Long Action tactical rifle, List of crew-served weapons of the U.S. Armed Forces, ANSI/SAAMI Velocity & Pressure Data: Centerfire Rifle, "Top cartridges & bullets for black bears", DETAIL SPECIFICATION CARTRIDGE, .300 WINCHESTER MAGNUM MATCH, MK 248 MOD 1 DODIC AB43, NSN 1305-01-568-7504 Revision A March 17, 2009, "U.S. Navy Small Arms Ammunition Advancements", "$49.9M U.S. Contract for 300 Winchester Magnum Ammo", "Advances in U.S. Sniping Ammunition: From Vietnam to Afghanistan by John Plaster - Thursday, September 12, 2013", JBM Ballistics freeware online ballistic calculator, "Weapon Employment Zone (WEZ) Analysis of the XM-2010 Rifle With Various Ammunition Types by Bryan Litz, Applied Ballistics LLC", Pentagon’s Top Tester Gives Sniper Round Passing Grade, "Magnum force: Kimber's police tactical rifle now chambers the potent .300 Winchester Magnum". Minuteman. Blends with barrel profile; Easy to install and remove; Many holes for proper attenuation ; Quality construction and stainless steel finish; Table of Contents. Thread starter r0cKf1sH; Start date Oct 11, 2018; Oct 11, 2018 #1 R. r0cKf1sH New member. Go. Dec 17, 2020 #1 Looking for some advice on a custom build. In 1958 Winchester introduced three cartridges – the .264 Winchester Magnum, .338 Winchester Magnum and the .458 Winchester Magnum, all based on the shortened and blown out .375 H&H Magnum case. Remington rebated the rim of the 300 RUM so it wouldn't have to increased bolt face diameter of its M700 actions. Lets take a look at drop and drift at 1,000 yards (the internet’s favorite distance) for each length barrel. Enter your email address to subscribe and receive notifications of new posts by email. Standard deviation generally decreased as the barrel got shorter. No other accurizing work has been performed. Minuteman. Looking at a couple different companies. [7], The .300 Winchester Magnum's high availability in popular rifles such as Winchester's Model 70 and Remington Model 700 made the cartridge a popular choice among the shooting public. Wildcatters soon produced the .30-338 Winchester and Norma Projektilfabrik, who were by now manufacturing ammunition for Weatherby, took the standard length basic Weatherby brass and necked it down to .30 caliber (7.62 mm) and called it the .308 Norma Magnum. Mag. This means it requires a magnum-length rifle action. *Recommended Powder C Compressed Load 1. These new magnum calibre models combine extended long-range accuracy potential with tremendous steel-ringing down-range energy, broadening the appeal of an already very popular rifle. Cut a magnum's barrel down to 22 inches and the muzzle blast and flash become intimidating. Long popular with big game hunters, the 300 Winchester Magnum has also been adopted by the US military as part of the M24 Sniper Weapons System and Mk 13. View Details. Sub 1 minute-of-angle (MOA) accuracy out to 1,000 yards (910 m) is not unusual in precision-built rifles firing match-grade ammunition. The projectile diameter should be 0.309 in (7.85 mm) [8]. Cartridge : .300 Win. The case volume will vary from manufacturer to manufacturer to such a degree the reloading software suite QuickLOAD provides five differing cartridge case capacities, that for reloading purposes significantly differ between manufacturers. Finally, the lure of potential internet greatness set in and I decided to pull the trigger. Financing Available – Apply Now. The popular .30 caliber's omission from that lineup was not missed. USER CHANGEABLE BARREL SYSTEM Allows the user to change barrel configurations easily and quickly with the use of only 1 tool. However, the handloader can take advantage of modern advances in powder technology and actually exceed the velocity of the MK 248 MOD 1 cartridge while still loading to maximum SAAMI cartridge overall length, and maintaining safe pressure. Recommended twist ratio is 1:10 (254 mm). 1 Top 5 Muzzle Brake for 300 Win Mag. Live fire tests were conducted in March 2013 against ballistics gelatin, light material barriers, and other targets to determine the projectile's ability to perforate targets. Barrel length, Barrel length and velocity, Cartridge Selection, Precision Rifles, Rifles My 22-inch barrels are invariably chambered to “standard” cartridges: 6.5mm Creedmoor, .270, .308 and .30-06. The .300 Winchester Magnum is a magnum cartridge designed to fit in a standard rifle action. All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized. The U.S. government purchased MK 248 MOD 1 .300 Winchester Magnum match-grade ammunition in 2009 for use in adapted M24 Sniper Weapon Systems and other .300 Winchester Magnum sniper rifles like the U.S. Navy Mk.13s. It tours the Remington factory in 1969 and shows many of the steps used to manufacture the Remington Model 700 rifle and the 870 and 1100 shotguns. Beginning with the .270 Weatherby Magnum in 1943, Roy Weatherby introduced a line of cartridges that while based on the Magnum H&H case were shortened to fit a standard length (2.5 in [63.50 mm]) action. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. I haven’t owned a 300wsm but a few buddies do and when they load a heavy bullet such as a 215 they have never broken over 2800fps. Rifleshooter.com and its authors,do not assume any responsibility, directly or indirectly for the safety of the readers attempting to follow any instructions or perform any of the tasks shown, or the use or misuse of any information contained herein, on this website. Report. [20], According to JBM Ballistics,[21] using the G7 ballistic coefficient provided by Bryan Litz, and a Weapon Employment Zone (WEZ) analysis of the XM2010 rifle with various .300 Winchester Magnum ammunition types by Bryan Litz, the MK 248 MOD 1 .300 Winchester Magnum cartridge, when fired at its nominal muzzle velocity of 869 m/s (2,850 ft/s), should have 1,286 to 1,289 m (1,406 to 1,410 yd) supersonic range under International Standard Atmosphere conditions at sea level (air density ρ = 1.225 kg/m3). A commonly asked question on hunting, long range shooting and Mil/LE forums is, “how long should the barrel on a 300 Winchester Magnum be?”   I’ve been coming up short of any objective analysis of barrel length based off of actual data- i.e., cutting back the same barrel and publishing actual velocities. Reply. Never miss a post! Post was not sent - check your email addresses! Mag. I developed a mild headache from the 50 rounds of ammunition I shot, despite wearing both ear plugs and muffs. Nov 23, 2006 1,656 183 65 Central Fl. As a testament to its accuracy, since its introduction it has gone on to win several 1,000-yard (910 m) competitions.[5]. Accuracy International AICS-AX 2.0 Chassis System Review: Initial Thoughts, Does size matter? 12 - 16 WEEK BUILD/DELIVERY TIME. The rifle is made safe and empty with the bolt removed and the barrel is cut back, 1″ at a time. […], In this post Rifleshooter.com will build a clone of the United States Marine Corps M40A3 Sniper Rifle. 24 inches is about the minimum barrel length practical for most magnum cartridges. Mag., .300 Wby. The lengthening of the case and the move of the shoulder forward over the .338 Winchester Magnum allowed for the reaming of the .308 Norma Magnum or .30-338 Winchester chamber to dimensions of the .300 Winchester Magnum. Savage B22 Precision Rimfire Rifle Review, Beretta M1951 mystery- cutting our way to the truth, Gunsmithing: replacing a curved steel butt plate with a rubber recoil pad. Here is a list of the parts, as well as the Brownells part number: The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. The worlds first .300 Win Mag AR. While in hunting situations such accuracy is unnecessary, such accuracy does aid in the extending the range of the cartridge. Timber Creek; 1.5 5. While it wouldn’t be your first choice for hunting ammunition, Federal Gold Medal works well, is widely available, and serves as a good standard for comparison. Using a fat, 404 Jeffery case 2.850" long with the 30-degree shoulder pushed well forward, Remington engineers were able to beat the case capacity of the 300 Wby. December 25, 2013 That means it was 55 F, heavy rain, and overcast with mild 5 to 10 mile per hour winds. The worlds first .300 Win Mag AR. (R) Bullet : .308, 180, Nosler PART SP 16331 Cartridge O.A.L. It also has a satin Cerakote touch that protects it from the toughest environmental conditions. Blaser R8 rifle barrels in stock. Steyr Scout Rifle Review: Is it the best truck gun ever? The .300 Winchester Magnum (also known as .300 Win Mag or 300WM) (7.62×67mmB) is a belted, bottlenecked magnum rifle cartridge that was introduced by Winchester Repeating Arms Company in 1963. The .300 Winchester Magnum is powerful enough to hunt any North American game animal. Theoretically, the .204 Ruger should be more sensitive to a short barrel than a .300 Win. This was an experiment I kicked around for the past year or so. The amount of recoil the cartridge generates is a step up from the non-magnum .30 caliber (7.62 mm) cartridges. If you want to shoot a heavier bullet say 210 or 215 the 300 win mag will push them between 2900-3000fps even with a 24in barrel. (R) Bullet : .308, 180, Nosler PART SP 16331 Cartridge O.A.L. Report. After I fired each set of rounds, I used an abrasive cut off tool to cut the barrel back and repeated the experiment. This created the much criticized short neck of the .300 Winchester Magnum. They chrono a barrel blank as it is test fired and shortened, inch by inch. Bullet weights of 10.7–13.0 grams (165–200 gr) are the preferred choices for these game species. In addition, magnum cartridges, such as the popular .270, 7mm and .300 numbers, lose so much velocity … Recoil and muzzle blast increased significantly when the barrel reached 20.25 inches in length and again below 18.25 inches. Most, while well informed, are based off of data extrapolation and comparing a few different barrel lengths on dissimilar rifles. The fact that the cartridge has gone to win many 1,000-yard (910 m) matches suggests that such a concern is unfounded. The ammunition standards organizations SAAMI (Sporting Arms and Ammunition Manufacturers' Institute) and C.I.P. The .300 Weatherby Magnum really needs a 26-inch barrel to reach its full velocity potential. While there may be differences in the effects on the quarry from the velocity, the difference in maximum point- blank range is relatively small  (34 yards) between the 24.25 (327 yards) and 16.25 inch (293 yards) barrels. When hand loading for the .300 Winchester Magnum, rifle magazine length has a great influence on the ease of operations. It is based on the .375 H&H Magnum, which has been blown out, shortened, and necked down to accept a … AccuBonds at 3000 fps in a 24” barrel will produce a muzzle velocity of 3000 fps and yield a downrange velocity of 1427 fps and 814 ft/lbs of energy at 1,000 yards (these results are from hand-loaded ammunition). This is the first day the gun will be fired. Also, the barrel is a hand-lapped one that is made of match-grade stainless steel. The introduction of the .300 Winchester Magnum was not unforeseen; rather, its introduction was anticlimactic. S. Shoottothrill Sergeant. According to the U.S. Navy this ammunition should increase the maximum effective range of .300 Winchester Magnum sniper rifle systems to 1,500 yards (1,370 m), decrease wind deflection on bullets in flight and use Hodgdon H1000, a reduced muzzle flash propellant that remains temperature stable across an operational temperature range of −25 °F to +165 °F (−32 °C to 74 °C). The .300 Win Mag remains the most popular .30 caliber magnum with American hunters, despite being surpassed in performance by the more powerful .300 and .30-378 Weatherby Magnums and the newer .300 Remington Ultra Magnum. We headed to the range with a 300 Winchester Magnum, a chronograph and my hacksaw. Jun 9, 2019. The author’s Winchester Model 70 Classic Stainless sports a 26-inch barrel and a … Custom Remington 700 16.5″ 300 Winchester Magnum follow up, You can read about our far more practical 16.5″ 308 here: Short Rifle, Long Range: Testing our 16.5″ 308 Remington 700 out to 635 yards. Military and law enforcement departments adopted the cartridge for long range sniping and marksmanship. So, what does this mean downrange? It features a suppressor-ready threaded barrel, a one-piece scope rail and 10-round detachable box magazine. My question is this though. The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. Many consider the .300 Winchester Magnum to be on the lighter side of what is required for the largest bears, but hunters have had success with the cartridge against these large bruins.[16]. Although cartridges such as the .30-378 Weatherby Magnum, .300 Remington Ultra Magnum and the .300 Weatherby Magnum all exceed performance of the .300 Winchester Magnum none of these cartridges can be chambered in a standard length action. slugs. The .300 WSM achieves what its designers intended, duplicating the velocities of the .300 Win Mag from a short, lightweight rifle platform. The .300 Winchester Magnum was designed with a neck which is shorter than the diameter of its bullet. Rifle will be chambered in 300 WM and equipped with a Silencerco Omega suppressor. I’m going to install a brake, crown the barrel the right way and be the proud owner of a 16.25 inch 300 Winchester Magnum barrel… I’m unsure I’ll shoot it much, if at all, but at least I can definitively tell someone what happens when you cut your 300 Winchester Magnum to 16.25 inches. Sorry, your blog cannot share posts by email. and a Lazzeroni 7.82 Warbird. Financing Available – Apply Now Although the .300 H&H Magnum, .30-338 Winchester Magnum and the .308 Norma Magnum had a head start on the .300 Winchester Magnum these cartridges soon faded into obsolescence. Almost no divergence between C.I.P. The worlds first .300 Win Mag AR. regulated countries are currently (2013) proof tested at 537.50 MPa (77,958 psi) PE piezo pressure.[10]. You are purchasing an ATF controlled item. It’s […], In this post Rifleshooter.com will install a Sako extractor in a Remington bolt action rifle. I don't think a barrel length of less than 26 inches on a .300 Win intended for long range shooting or ballistic performance makes any sense. 300 Winchester Magnum Powder Minimum Maximum Charge (grains) Velocity (fps) Charge (grains) … Best prices, no tax, & free shipping. The rifle is issued with a special case that has been designed to attach to the search and rescue technicians' parachute harnesses. The Sako 85 Hunter chambered in 300 Win Mag is a great option if you’re in the market for a hunting rifle of the highest quality. Notably, the .300 Win Mag cartridge fires a projectile that on average can best the .308 Winchester cartridge by 50% on overall distance while maintaining lethality. The rifle is based on the standard Ruger M77 Mk II rifle but the barrel has been shortened to 14.5". Also, many rifles available today now have effective recoil attenuating features built into them, such as muzzle compensators and energy absorbing stocks and butt-pads, that can significantly lessen recoil as it is felt by the shooter. I'm looking into putting together a .300 Win Mag and want to suppress it, right now I am leaning towards a Surefire SOCOM RC silencer. The .300 Winchester Magnum can be used to hunt everything from the dik-dik to the giant eland. Discussing the methodology with friends, I originally envisioned stopping around 20″, cutting off the chamber end of the barrel and using it for a 308. There are still many manufacturers chambering the .300 Win Mag in rifles that feature short magazines, potentially (but not always), producing less than desirable and sometimes frustrating performance with hand loaded long for caliber projectiles. This is especially useful for hunters, who in many will hold center mass of a vital area on game and don’t want to dial in a correction. | Rifleshooter.com . Once with a 7mm and lighter projectiles and a 7 twist. Caliber: 300 Win Mag Barrel Length: 24 in Full Length: 45.5 in Weight: 10.2 lb. They have amassed a lot of data on various cartridges (mostly handgun). The SAAMI specification .300 Winchester Magnum case capacity is 91.5 grains of H2O (5.93 ml). Mag. With bullets of good sectional density and ballistic coefficients the cartridge possesses the long range performance necessary to take large game species at extended ranges.
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