If you want something in the 450 grain weight with a 28" arrow your going to have to go with the A/C Super Slim. I'm shooting a 500 grain total weight Super Slim in 340 deflection with 125 grain heads at 29" in my 71# bow. They have a few more grains/inch of shaft than either the Axis or the A/C/C. The A/C/C is the toughest arrow I've ever shot but I haven't really torture tested my Super Slims yet. I'd suspect that with their heavier weight, they're even tougher than the A/C/C.