Years ago, I shot the GS Custom banded monolithic copper projectiles, 110gr HV's in my .270 Blaser. They grouped phenomenally well, well under 0.5 MOA and out of the standard .270 I was getting well over 3400 fps.However if one is looking for a high bc bullet for longer range hunting one should look elsewhere than any of the monolithic solids IMHO.
I think the longest shot I made on an animal was about 350 yards if memory serves me right and it was a bang flop, with massive internal damage (the GS Customs are designed to shed their petals, where they radiate out and cause severe lacerations to the animals internals, while the solid shank contines to drive in a straight line and often exits). However, BC is not spectacularly good, so probably best to keep it under 500 yards.
I see that GS Custom offer a .264 121 gr HV with a BC of around .550. However at over $2.00 a projectile I think I'd be looking elsewhere and in reality there are plenty of other great projectiles out there.
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