Dec 22, 2009 · Talked with Sierra Bullets (1 888 223 3006) today to find out what the Minimum and Maximum load for Varget is for the 22 cal (.224 dia) Sierra 65gr SPBT GameKing #1395 (7”-10” twist barrel only). The gentleman I talked to said use the same data for the 63gr. Reason: the weight of (63gr) and the small bearing surface (65gr) have give The Western data guide contains 5.56x45mm (5.56 NATO) load data developed in a.223 Remington chamber with Winchester.223 cases (so they are okay to shoot in either a.223 or 5.56 chamber) with a maximum average pressure of 62,350 psi.
63 Sierra dumps deer hard, then again, stuff ain't hard to kill when the shot is in the right place. I used a max load of IMR 4350, win primer with the 63's in my 14 twist 22/250's, unreal accuracy to say the least. I have killed two does, lung shots, with the 55g Sierra in a 223 loaded with 26.5g of Win 748, 55g Sierra.
300 AAC Blackout, 150gr Sierra GameKing FMJ – 160 Round Bucket. This load is manufactured to the same insane quality standards as the other Gorilla Ammunition match loads. This product features a 150gr Sierra GameKing Full Metal Jacket Boat Tail projectile and a factory new brass case.