that Im patiently waiting for (4 months pending thus far - Surefire 556-212). 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. ATOMICs 5. subsonic 223 reloading data New reloading data must be opened as a PDF. 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. The 5.56 Ultra Stealth Match Subsonic is the most quiet and accurate 5.56 x 45mm NATO Subsonic round on the market. There are standard loads as well like subsonic 22, subsonic 223, and subsonic 9mm. Subsonic loads need to be under 1100fps and in reality need to be in the 1050fps range due to acceleration of airflow over the curve of the bullet which will cause local sonic booms if you shoot at 1100fps. 22LR size and power so any vest that can be defeated by a. So to answer the original posters question: no I don't know of anyone (living) who is using 4064 for subsonic loading in either. 223 Remington / 5.56mm NATO Ammo Family Owned and Operated Ammo Sales, Stillwater OK Ammo Quick Links 9mm / 9x19 40 Cal 45 Auto / ACP 223 /5.56mm 7. ago I wouldnt bother man, its a hassle to get them cycling reliably because you basically made a. That means you turn the AR into a straight pull bolt or you shoot it out of a bolt gun. Anyone have information on subsonic loads for 223/5. I would seriously doubt any 55gr bullet going 1,000fps would get through soft armor. 5.56 sub dont cycle ARs that are gassed and sprung for supers. Use of this data in firearms with insufficient barrel twist rates may result in poor accuracy, key-holing, and internal strikes that could cause damage to muzzle devices such as brakes or suppressors. 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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