Barnes make a blackout projectile when seated it is the same length as a 223 .I Will take some pics tomorow if you need found it solved some feeding issues over the 110 grn Sierra.i have been using lil gun powder for subs and supersonics easily getting 2350fps a little more if needed.I shot a whitetail about three weeks ago was close about 30m.i don't think it would have mattered what I was using there as it was close and bang flop regardless of calibre.
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