Best 6.5mm projectile?

[Exodus343]

http://www.midwayusa.com/product/326284/lapua-bullets-264-caliber-65mm-264-diameter-144-grain-full-metal-jacket-boat-tail-box-of-100

Lapua 144 grain FMJ
BC is 0.636 WOW

[BLR81]

http://www.midwayusa.com/product/326...ail-box-of-100

Lapua 144 grain FMJ
BC is 0.636 WOW

At 45 cents a bullet, you much be shooting at the Olympic trials.

Personally, I'd go with something a little cheaper for practicing. The Hornady A-Max in that weight have a BC around .550 and cost almost half as much.