All you can hear is the bullet smacking the steel swinger. I cheched this myself with a MP3 recorder and mic and in person by standing a safe distance behind a barricade ( huge white oak ) from the 6" swinger. These loads and others were shot with Trail Boss powder in an attempt to develop subsonic velocities (left to right). There has been a lot of chatter on Internet sites lately. develop subsonic velocities (left to right). These loads and others were shot with Trail Boss powder in an attempt to. 223 Rem with 55 gr NBT and 4 gr TB for 1065 fps.30/30 Win with 160 H-FTX and 7.5 gr TB for 1075 (ish). Author: John Haviland / Wolfe Publishing Co. Heres what Hodgdons load data yields for 223. thus far I have not veered far from the blazed trail. handloads, and faster-burning powders like HP38 and Trail Boss can be used for low-velocity specialty loads. When fired even single shot through an AR w/ suppressor these rounds do not make any noise that can be heard at that distance. I started messing around with Trail Boss. 22LR.įor SHTF situations this load can easily kill a person or deer size game at 175yds with a head shot. Loads using the PRVI 75gr BTHP-M bullet are pretty impressive compared to a. 223's w/ Hornady 60gr HP 1,050ft/sec ( just for kicks ) that shoot flatter, are more accurate and have more energy at 175yds ( I have a target stand w/ 6" swinger at 175yds ) than the SSS. The Aguila 60gr SSS only has a muzzle velocity of about 950ft/sec with a round nose bullet and I have loaded a few. 22 conversion using a 1-9 twist barrel and 60gr SSS ammo from Aguila. 22LR round that has the downrange terminal ballistics of a subsonic 60gr or heavier bullet. The very best subsonic 223 load for any of these rifles is a. Actually if I was going to build a suppressed big bore AR I would go with something based on the 6.8 brass and. Case capacity is when you fill the whole case up with powder then remove enough to seat the projectile to its correct depth without compression. Similar to Sergeants comments, trail boss is the go, usually 80 of case capacity. 300BU/Whisper/etc would be nice but the OP asked about subsonic. Gives lead cast bullet subsonic loads for all calibers and bullet weights. If I wanted a suppressed AR I would go with the 300 Black Out.
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