There are several schools of thought when it comes to picking the right bullets for subsonic use. Other pistol powders will not fill the case and this can result in erratic velocities or dangerous pressure curves. What this provides is an even and consistent cartridge ignition. Fifteen grains of TB is enough to nearly fill a. 308 because it is made to take up lots of internal space inside the case. The kernels of powder look like little Cheerios at first glance. 38 with Trail Boss and love how it works. Trail Boss (TB) was originally designed to work in cowboy action cartridges like. In this test I’ll be loading several bullet options from Hornady and I’ll be using the premier subsonic powder on the market: IMR Trail Boss Powder. The tighter twist rate enables the slow-moving bullets to gain a bit more gyroscopic stability in flight and this is a huge thing when we’re dealing with low pressures and short ranges. You are almost guaranteed a keyhole from a 1:12 bore. I’ve found that the 1:12 twist rate isn’t fast enough to stabilize most projectiles moving at subsonic speeds. 308/7.62 rifles and is in my opinion the most versatile twist rate available for any. The rifle I have has a 13.5” barrel with a 1:10 twist. In short, I’m using something that simply launches bullets in order to remove obstructions that could cause error. 308 in a bolt gun because it allows more linear testing without the variable of cycling pressure and gas bleed-off. 308 Win ammunition in a bolt action as my example as it is easily made subsonic and is a good cartridge to begin working with. 308 Win Handloadsįor this article I’ll be using. A Bolt Action Rifle was used for shooting Subsonic. You don’t want that to happen with an expensive suppressor attached. Again, seems like a no-brainer but I’ve seen many guys load subsonic that keyhole at 100 yards or less. The projectile must be able to stabilize in subsonic flight in order to be accurate.
The second thing to concern yourself is one that often escapes people: bullet stability. Granted, you may pick up or lose some speed given external variables, but fear not as there isn’t that big of a difference in performance at the effective range of most subsonic cartridges.
Whats subsonic speed crack#
If you've ever been shot at by a high powered firearm of some type, the first thing you hear is the crack from the bullet going by, usually followed by the bullet hitting something, then you hear the report of the weapon.As a result, I have found that a velocity of 1050fps at the muzzle is a nearly optimum speed for any condition range. That's why the pro's like sub sonic stuff for sneaky work. The reflection of the sonic boom off the bullet as it passed each pole sounded like a short burst from a machine gun. Back in the day when I lived out where folks were few and far between, Every now and then I'd shoot my '06 parallel to a row telephone poles alongside the road. That was an interesting article linked above. I wouldn't trust 'em for humane killing of small varmints past that and sure wouldn't advise on anything bigger than a bushy tailed tree rat. Not a lot of power but I've popped squirrels off dad's bird feeders with 'em at 20 to 30 yds. In most cases the bullet hitting what you shot at is louder than the shot itself. If you want REALLY quiet ammo without resorting to a suppressor, 22CB caps out of a rifle are very quiet. Anything else made recently and I doubt they'd cycle. They'd probably work fine in a REM 552 as well. It was made to shoot 22 short, 22 long, and 22 long rifle interchangeably, so it handled them no problem.
Whats subsonic speed mod#
They cycled just fine in my old REM Mod 51 semi-auto.
Not silent by any stretch of the imagination. Quieter than standard or high velocity anyway. They're fun and relatively quiet out of a rifle.
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