

Subsonic 223 ammo that will cycle full#
Now that I've fired off a mag full of subsonic loaded as I mentioned and seen zero signs of pressure, I am confident in my load.

I started low with Varget and worked up, checking my cases for any signs of pressure each time, as well as ensuring no bullet was stuck in the barrel. Filling the cartridge to the actual rim of the case and seating a bullet on top will still not cause pressure signs. There is NO WAY to get overpressure from a full. No flattened primers, no dimpled primers, no bulging cases. I look for PRESSURE signs by checking my cartridge and the primer.

I haven't heard one so it is subsonic (at the temp and elevation that I live at).
Subsonic 223 ammo that will cycle crack#
I know a supersonic crack when I hear one.

WHAT?! Where did I say that? I said I was basing my conclusion that it was still SUBSONIC on sound. The final load that worked well for me was what I posted above. I then started with *** Varget and *** Trail Boss and kept incrementing the Varget by ***, reducing the Trail Boss to always end at the base of the case neck. Starting off I found it was impossible to load enough Trail Boss into the cartridge to go supersonic or cycle the action (all the way to the rim and compress loading the bullet). I've been using magnum primers to get some extra oomph but will switch to normal primers when they're used up. This load has also worked with other bullets I've tried like Hornady 168 gr A-max. 223 100 grain ASP (Advanced Subsonic Product) round specifically designed for civilian AR-15 modern sporting home defense assault rifles with suppressors. The bullet I'm using is Hornady 180 gr SP Interlocks (flat tail/base). This fills the cartridge to the bottom of the neck and produces a lightly compressed load. The load: *** Varget and then a**** gr Trail Boss powder on top. I've tried it with and without a silencer. I don't have crono data yet, am simply going by ear (no supersonic crack). I've tested this load over multiple rounds and it works. The rifle is a carbine, 16" barrel, full length gas system. I have also thought about cutting a few coils off the standard buffer spring to see if this helps.I've developed a load that is subsonic and cycles the action in my DSA SA58 FAL rifle. I need to find a reduced spring that I can try. I am leaning towards playing with the buffer spring and/or buffer. The idea of changing out the bolt carrier and gas block and such is not an option. So, my solution needs to be simple and easily available to all shooters. What are some options I can do to help aid the cycling? My goal is to have a subsonic round to sell to any and all shooters who have an AR-15 with 16" barrel and a 1:8" or 1:7" twist barrel shooting suppressed. When I get my speed up just above 1100 fps (supersonic speed), it will cycle and the bolt will lock back on an empty mag. It will eject the spent case, but the bolt will not lock back on an empty magazine. 22 Long Rifle ammo, has virtually no felt recoil, produces the same energy and power as most 380 ACP ammunition and delivers excellent accuracy out to. When I get down to the speed I need, I can not get the bolt carrier to fully cycle the next round. NOTE: This ammunition is not specifically designed to cycle semi or fully automatic weapons. I have a working subsonic load with both bullets in a standard M4 type, 16" barrel shooting suppressed. I am working with some custom 87 grain and 94 grain flat base, HP bullets that will stabilize in a 1:8" or 1:7" twist, 16" barrel. Using a 45-grain round-nose lead bullet at a muzzle velocity of 1,090 fps (my chronograph showed an average of 1,050 fps from my Ruger), the Winchester M22 Subsonic load offers all the accuracy of the M22 line, but in a quiet and efficient package. I began working on my 223 subs that will cycle an AR. Aguila’s SSS ammo will definitely ruin a garden pest’s day. I need some help guys! I know ammo very well, but I don't know the inner workings of an AR as well, like some of you do.
