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Was out yesterday with a few guys rifle zeroing had one 223 and a variety of makes. The rifle a troy par with aftermarket trigger had several ftf with pmc bronze but functioned flawlessly with...

When i reload 223 which isnt often now, my go to projectile is the 55 gr hollowpoint gameking, flies like a brick but hangs together and penetrates. 200 yds is its max practical range though plenty...

They would have stableised at around 4000 fps, if you could get them that fast.
In the transition zone at around 2500 fps interesting things happen with marginal bullets, they go from good grouping...

Pretty devastating terminal performance with those IF you can hit the target.

Correct, and konevs point about light ones with thin jackets in very fast twists is a good one. At 3200 fps a bullet fired from a 1:7 twist is doing 329,1000 rpm and that will rip a 40 grain varmit...

Measure your twist rate, super easy to do with a rod, brush, black marker pen and ruler. That will let you know how heavy a bullet it can take. Otherwise start at 55 grains and keep going up till...