I'm wondering if anyone has a good load for a Win 300 mag / Win model 70 using Barnes 180TSX. I'm getting wild results with several loads. I use COL 3.52 because that is as long as a Win model 70 magazine will allow, but there is a lot of play room before the bullet touches, like maybe 1/4 inch.
Anyway, Ive tried at $1.00 each IMR 4831 69.5 to 71 grains (five rounds each 1/2 grain) and 71to 72 of IMR 4350.
Actually, looking at the targets from the last year the 4831 loads and 4350 shot wild 4' inch groups but in the same wild places (different places between powders), so it ain't me flenching expecting the punishment of the 300 Win.
I like a quarter size 100 yr group. Has anyone else had this problem? Any recipies with IMR 4831/4350 without watering down to 30-36 velocities?