Your 270 is ligth for my tastes but will work fine if you put em in the right spot. As regards accubonds I have used extensively they tend to be an accurate bullet, use in 270, 7mm mag, 30-06, 300 mag. they will mushroom nicely and penetrate deeply, you will loose some of the front portion peeling or exploding off and i would say weight retention around 70% on avg more when they are moving slower out of 30-06. as we all know SAF's mushroom and penetrate deep with high weight retention. I dont like Barnes bullets as I tried the original x bullets and they sucked! got pressures to high to quick werent accurate aslo copper fouled barrels bad. so i dont shoot barnes not to say new versions arent good I am just a nosler and SAF guy. I would shoot giraffe with 375.