Is Reloading on the way out?

[Catfish]

Bill,
I`ve been shooting the Serrias. I shot 1, 3 shot group at 500 yrds. with them and it was 3 1/4 in., just over .6 moa at 500 not to bad, but I think I can do better. That load was way to slow to suit me though, 2,800 fps. I filled the case with H-870 and got it up to 3,200 fps. still to slow so I`m looking for acouple different powders. OH, the round is a .22-6mm. I did alittle playing with the 75 Hornady A max and they showed promess, but I`m wanting to get alittle faster powder befor I play to much more, kinda looking out for barrel life with this hot rod. I should get 3,500 to 3,600 fps with an 80 gn. bullet.
I did get 1 coyote with it at 350 yrds. He just fell over and never moved. But I really expect that from this rifle. I built it for long range and it wears a 24X Leupold so my aim point at 500 yrds. is a bullet hole. AND, from what I`ve seen so far the bullets are landing exactly where the Serria ballistics charts says they should.