Bullet: 68 gr Hornady BTHP (Match) Primer: Winchester SR. I did some experimenting and found some other successful 223 loads, as follows: Bullet: 55 gr Sierra SPBT. The AR15 and the Ruger 10/22 have something in common other than the fact that both are semiautomatics. ![]() 223 Remington reloads here are a few pointers on how to build super-accurate handloads for Americas longest-lived battle rifle. 5.56mm CYCLING SUBSONIC 75GR JHP - SHORT BARREL LOAD. You’ll have to not hear it to believe it. 223 subsonic round that will fully function a military M4 and/or commercial developed AR-15s. Quick review Add to cart.223 Rem 55gr REX -EXPANDING SUBSONIC- 34.95. To achieve subsonic velocity one must change the powder, powder charge and seating depth. The load fizzled and I had a stuck bullet. Matched to the right loads, an AR-15 can be incredibly accurate with. In Stock Items Only Sort By : Show : Quick review Add to cart.223 Rem 75gr JHP SUBSONIC. 223 Subsonic Ammunition is new production, non-corrosive, boxer primed, re-loadable brass. Come with as I shoot my first down loaded 243 rounds attempting to drop below the speed of sound and see if it retains accuracy and consistency. I switched to CCI Benchrest primers - DON'T DO THIS.
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