![]() The Remage nut is special made by McGowen to work with your barrel and can be installed with a Savage wrench. Please not a regular savage nut will not work on this barrel. It requires a special lock nut to lock the barrel down after installation. This barrel has no shoulder and is similar in design to the Savage Pre-Fit barrel. This upgrade should be performed by a qualified gunsmith. The first is a standard Remington replacement with a shoulder on the barrel. There are two options upgrading your barrel on a Remington rifle. It allows you to use one action and swap out barrels for multiple cartridges. The beauty of the Savage system is the ease of installation for your new barrel. You’ll see McGowen prefits on everything from hunting rifles, to long range competition rifles and Savage Striker pistols. Savage BarrelĪs a leading manufacturer of aftermarket Savage barrels, McGowen has grown increasingly popular as a highly accurate replacement for your factory Savage Barrel. You can also have your barrel threaded for a muzzle brake or a custom McGowen Turbo Brake installed. Available Calibers for your McGowen 338Cal BarrelĬustom Lengths Available from 22″ to 30″. Proven match grade accuracy delivered to your door. ![]() Then hand lapped to ensure consistency and ease of cleaning. Our McGowen Barrels are all top quality 416R Stainless Steel, button rifled and stress relieved. The same high quality you have come to expect from McGowen Precision Barrels. Custom twist rate, length, contour, chambering, threading and finishing all delivered directly to you. Replacement Barrel for your Savage, Remington and Remage rifle. The ability to use AR15 mags in the bolt gun (especially with this cartridge/caliber) makes. I have an AR15 chambered in this caliber already and really wanted to do a bolt gun in the same caliber. It is 10mm magnum pistol brass necked down to. I should have said 338 Whisper #2 biased on the fireball case.Custom McGowen 338Cal Barrel In-Stock. 338 Spectre is just a slightly bigger version of the. Yes sub sonic only and maybe even some Supersonic loads But I would need to run numbers. The muzzle pressure drops a lot faster in a larger bore dia than a smaller bore dia for the same case size. ".338 Whisper #1 is made by necking up 7mm Benchrest brass to. The cartridge looks absolutely ridiculous, with a short fat case and a loooong bullet. I'd say 1/2 of the total cartridge length is bullet. We use CCI small rifle benchrest primers. I ream the flash hole and uniform the primer pockets, but I don't have a. Loading is done with Hornady Custom New Dimension full-length dies. Same load with 13.4 grains H4227 average velocity 982.4 fps, standard deviation 8.42ĭown to 13.2 gr 4227, average velocity ROSE to 996.2 fps with SD 9.43 H4226, 13.6 grains, Sierra 300 gr BTHP: Average velocity 1035 fps, standard deviation 16.37 H4227 13.8 gr, Sierra 300 gr BTHP: average velocity 1040 fps standard deviation 12.64 In view of the recent thread about bullet behavior close to the speed of sound, we may have to make some changes to get the best accuracy. Go up to 14.8 gr H4227 and average velocity is 1125 fps with SD 12.28 and groups shrink to 1.5""Įnd SNIP. The Specter is off the 10 mm mag brass so it can work in a AR platform vs the 7mm BR (308 bolt face) so it's AR10 platform. I suspect I would probably go for the common bolt face of the whisper It's loads are about the same as a 357 mag Out of a rifle length barrel the MP is not much. Whisper #2 is formed from the 221 Fireball and is OK in a AR platform. The bolt face of the Specter is an odd size being a pistol case, and is not shared with much unlike the Whisper #1 (308) and the Whisper #2 (221/223) so bolt selection is easier for the Whisper (I would go with the. 378" Whisper #2) You could even use 223 brass and form like you would 300 whisper. Sounds like a reason to do some wildcat work. It sounds like it will be fine as the 223 has a lot higher pressure curve to deal with. I don't see any reason for this not to work. I think I will change the rating o the can to reflect a certain amount of muzzle pressure instead of calibers.
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