I've done a fair amount of shade tree ballistic testing with shorter barrels, lower velocities, twist rates, and various weight projectiles up to 75gr.īottom line is that heavier rounds can only compensate for so much, and running the velocity down to 1000 fps or so, even with a 75gr round, makes for a much less lethal round. 223 relies on muzzle velocity for terminal ballistics. 223 subsonic has 20% more velocity at 150 yards than a. and only a powder-puff impact with 57 ft. 223 with a 75 grain boat-tail subsonic will still hit the 150-yard target at 960 f.p.s., while the. (see the chart from the Federal ammunition company at this link: ). 22LR subsonic round-nose will hit at 930 f.p.s. At 100 yards the difference is small (about 6%), but if you take a 150 yard shot, the. 223 bullet will have a much better ballistic coefficient, and thus will retain its velocity better. (180 ft/lbs versus 130 ft/lbs in example above).Īlso, the sharply-pointed. 223 round is nearly twice as massive (weight), and this will strike with a lot more kinetic energy, even at the exact same velocity. 223 bullet moving at the same muzzle velocity. (just barely still subsonic) is NOT like a 75-grain boat-tail. 22LR bullet initially moving at 1040 f.p.s. After that, if you miss, you have the choice to either slink away quietly or cock your gun and hope the bad guys didn't hear you do that or see your arm movement. For tactical applications, against bad guys with their own guns, you'd just have to accept that you only get one fully suppressed subsonic shot from deep concealment. For plinking at the range, it's no big deal to cock the rifle in between shots. For most hunting or pest control applications, you only need one shot most of the time. They probably will not cycle the action as a semi-auto, but if you need more than one quiet shot, you can rack the charging handle manually. But don't pretty much all AR pattern rifles made in the last 15 years come with 1:9 or faster twist? And even the bolt-action guns tend to be 1:10, which is probably fast enough to stabilize up to 62 grain subsonics, and maybe the 75 or 77-grain boat-tails too. The heavier bullet loads, combined with slower speeds (the bullet spins at lower RPM's) means you need a fast twist barrel. 38 special standard-pressure load (either 158 grain or 125 grain). The heavier-bullet loadings like the 75-grainers will generate 200 foot-pounds of energy, making them in the same power class as a. bullet at 1010 fps) Allegiance Ammunition (100 grain at 975 fps) Custom Reloads of Dallas (55 gr. Several smaller ammo companies load subsonic rounds for the. 223 / 5.56mm ammo through their AR's and their bolt-action weapons that serve has host guns for their 5.56mm suppressors? Has anyone tried running subs and supers through the same rifle without modifications and got reliable cycling?Why don't people seem to be interested in shooting SUBSONIC. This would be a major draw for me if they did cycle and it would help me overlook the hefty prices for this ammo and pistol.
Subsonic 223 ammo full#
Has anyone tried subsonics in the pistol and had them cycle reliably? Even being a blowback it is still designed to manage and cycle based on full power rounds and could have problems with a suppressor and lower powered rounds producing less force to overcome the springs? I do like the idea of having 50 rounds in the PS90 where the first 10 or so are subs then 40 supers to follow it up or having 3 or 4 subs in a pistol with 17 full power ones waiting to go. Even a 240gr 300BLK moving the same speed is hit or miss getting through soft armor and it has over 4 times the energy. 22LR size and power so any vest that can be defeated by a.
I would seriously doubt any 55gr bullet going 1,000fps would get through soft armor. Has anyone tried running subs and supers through the same rifle without modifications and got reliable cycling? View QuoteInteresting take on the 5.7 and PS90.
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