Mike, to clarify my comments, I do not object to a 270 grain .375 copper bullet per se. A 300 grain copper bullet could be unstable unless your rifle has a quick enough twist due to the excessive length of Barnes bullets.

My objection therefore is to the excessive velocity only. Personally I would be tempted to hunt with the 270 gr. Barnes X at 2450 fps instead of the 300 grain Barnes at the same velocity due to stability issues, unless you can verify that your 375 Ackley has a 1:10" twist. In that even the 300 grain Barnes should be stable.

However, an even better solution is the North Fork bullet.

www.northforkbullets.com

Frankly I do not know why people mess with Barnes. Even the new ones still crap up a barrel quickly.