I had fun at the range yesterday dialing in a 1959 Winchester M70 338 Win Mag Alaskan. I knew it liked Barnes 225 gr TTSX, but I thought I'd try out a bunch of different factory ammo including Federal 210 and 250 NPs, Hornady 185 GMX, 200 and 225 SST and Fusion 225s.
The rifle definitely likes 225 gr weight, and did well with the Barnes TTSX and Hornady 225 gr SST. The TTSX did the best. I noticed a little pattern when I shot. I got 2 shots very close together, and the third flies off a bit. The top left target, first two shots were the on the left and would have rated a .75. Top right target, first two shots were on the right and would have been a .3. Bottom left target, believe it or not the hole on the right is two bullets! That would have been .1 territory. The bottom right, first two shots are on the left which is about .5. I think it may be due to the barrel heating up between the 2nd and 3rd shot, which is causing the shot to stray. It may also be recoil pushing the end of the pistol grip to the rear bag, causing the muzzle to twist. I'll have to spend some more time dialing it in next go around.
The rifle is bedded in an Echols Legend stock, by Gene Simillion. He averaged .75 with 225 gr TTSX. It's scoped with a S&B Zenith 3-12x50. It's the first scope I've used in FFP and I love it!! Crystal clear and very positive.
Eric
The rifle definitely likes 225 gr weight, and did well with the Barnes TTSX and Hornady 225 gr SST. The TTSX did the best. I noticed a little pattern when I shot. I got 2 shots very close together, and the third flies off a bit. The top left target, first two shots were the on the left and would have rated a .75. Top right target, first two shots were on the right and would have been a .3. Bottom left target, believe it or not the hole on the right is two bullets! That would have been .1 territory. The bottom right, first two shots are on the left which is about .5. I think it may be due to the barrel heating up between the 2nd and 3rd shot, which is causing the shot to stray. It may also be recoil pushing the end of the pistol grip to the rear bag, causing the muzzle to twist. I'll have to spend some more time dialing it in next go around.
The rifle is bedded in an Echols Legend stock, by Gene Simillion. He averaged .75 with 225 gr TTSX. It's scoped with a S&B Zenith 3-12x50. It's the first scope I've used in FFP and I love it!! Crystal clear and very positive.
Eric
You didn't mention in the OP your distance? 200'?
