Thread: What's the Deal?

I was shooting 42gr of 2209 with 140Amax out of a 20" 6.5x47 too. I found pressure too high and have backed off to 40.9gr (for better accuracy as well, bonus). Previous velocity was 2810fps average via my Shooting Chrony f1 (oh no!) and that velocity was accurate for centre hits to 910meters (As far as I ever bothered to shoot it) so my crappy chrony can't be too far off. I haven't had a chance to chrony the new load but I'm making an educated guess of between 2740-2760fps.

My .260 research for whenever I get around to loading it has indicated that a max load can be anywhere from 41-44gr of 2209 (H4350, it's the same thing) and a 139/140gr will get anywhere from 2700-2850fps in a 22-24 inch barrel, depending on the brass and the chamber and the barrel so 2644fps for 42gr of 2209 sounds reasonable to me. Loads seem to be quite inconsistent but H4350/2209 seems to be universally 'the powder' for a 140 in .260.


Similar to 65x47 actually - some people can't get over 40gr of 2209 with a 140gr without hitting pressure, I was at 42gr and only getting real pressure on 30°+ days when I left my ammo lying in the sun - sticky bolt, ejector mark and 1-2% pierced primers. Normal weather, no signs at all.