I expect powder placement will have a significant effect on accuracy and pressure. I intend to do more testing in this regard to see what effect powder location has on the velocity and if any ignition concerns arise. All my loads were fired with the rifle horizontal and powder settled horizontally in the cases before chambering them. I had no hang-fires whatsoever and very consistent chrono numbers, BUT I didn't test powder location within the cases. Primers did NOT set back but brass was pretty snug in the chamber to begin with. I shot a steel plate at 50 yards with one shot and the steel report was crazy loud compared to the report of the rifle.Ĭases were fully obturated and clean except a tiny bit of soot on the necks. Suppressed, the 6.5 grain load sounds exactly like firing a roll cap pistol, if you take away the bullet impact noise. I'm switching to SL-71 next test to see if the paraffin addition doesn't make the lube fling off better. Also, got some stringy lube boogers on the target without the suppressor, and some black greasy dust around the groups on the paper with the suppressor. I only tested at 15 yards because I was in a hurry, but open sights gave me 1/2" groups of three without my Form 1 suppressor installed and and literally put them all through the same hole WITH the suppressor. Elevation 1600 feet, not that it matters.ħ.1 grains gave me an average muzzle velocity (MagnetoSpeed) of 1030 fps for five rounds.Ħ.5 grains of Red Dot gave me 975 fps average. Range was calm, clear, very dry, and temperature about 70☏. Bullets seated in Forster Benchrest sliding collet die to 2.260", this puts the front band into the throat's freebore with about. 003" neck tension (too much, actually), cases belled just enough to prevent shaving. NO mods to flash hole diameter.ĪCE 235 grain plain-based bullets (similar to NOE 311-230) cast of 2 COWW/1 SOWW/1 soft scrap, air cooled, sized. WCC-08 brass, match-prepped, necks turned, trimmed, inside VLD chamfer. 308 Winchester, Savage 111 LH with Savage factory 20" hog rifle barrel swapped to it. All disclaimers apply, don't be a dummy and if you blow up your stuff or get a baffle strike or have a Secondary Explosive Event (SEE) it's your own asphalt. I'm sure one of the whisper owners will be along shortly to correct me if/where I am wrong.Info is scarce on this so I made some for the internet. Some want it for hunting critters in the yard, others for hearing safe practice or youthful shooters. The whole Idea of a SS.30 caliber round is a healthy mix of power and stealth. The one advantage I see with the whisper is the ability to run in an AR platform.Īs mentioned already above, the benefits of SS ammo of any kind is the quiet fashion in which the bullet makes its way to the target. 308 however will shoot subsonic just as good as a whisper IMO, AND when you want to shoot regular supersonic ammo, you have the good old trusty. Even if you load a whisper at supersonic speeds, it will never compare to a. because once you got it, you've got just that. I've argued the same point with the 330 whisper/blackout/221/ect. and I just cant understand why you would want a subsonic. Originally Posted By: ApophasI have beeen reading this thread.
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