Ready to build my upper. HELP

[srm109]

Dont know about subsonic loads on deer kills. I havn't done that yet, but there's no reason why not if you keep the shots close, say under 100 yards. There's plenty of folks here that can tell you about that since I don't know.

You can always load supersonic for hunting purposes. That I know about! I bagged a big 8-point with my 300 "Fireball" at 75 yards using 125 grain Sierra's running about 2300 fps. It was like a bolt of lightning hit that big old buck!