I think I will change the rating o the can to reflect a certain amount of muzzle pressure instead of calibers. I don't see any reason for this not to work. It sounds like it will be fine as the 223 has a lot higher pressure curve to deal with. Sounds like a reason to do some wildcat work. 378" Whisper #2) You could even use 223 brass and form like you would 300 whisper. 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. Whisper #2 is formed from the 221 Fireball and is OK in a AR 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. 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. 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. 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. Loading is done with Hornady Custom New Dimension full-length dies. I ream the flash hole and uniform the primer pockets, but I don't have a. We use CCI small rifle benchrest primers. I'd say 1/2 of the total cartridge length is bullet. The cartridge looks absolutely ridiculous, with a short fat case and a loooong bullet. ".338 Whisper #1 is made by necking up 7mm Benchrest brass to. The muzzle pressure drops a lot faster in a larger bore dia than a smaller bore dia for the same case size. Yes sub sonic only and maybe even some Supersonic loads But I would need to run numbers.
I should have said 338 Whisper #2 biased on the fireball case.
0 kommentar(er)
