Some load data from this weekend. I'll have some 250grain SBD2 data within the month. Now that my rifle is broken in, it doesn't like the 275's like it used to. My twist is definitely too slow for the 275's at 1:9.3. Granted, I did shoot a couple sub MOA groups at the 300 yard line (barely) with the 275's, but I want them a lot tighter. Although, they didn't shoot horrible out at 1000 on Sunday, and these rounds were seated .010" further out compared to what I usually seat them at. Guess I'll have to do a seating depth test with the same charge to see if it tightens up.
Anyways, these speeds and charges might give someone a starting point. Ran H1000 and IMR 7977.
338 Norma Mag/ 26" - 1:9.3 twist Bartlein 5R
Case: Peterson (non virgin)
Primer: Fed 215
Powder: H1000
Bullet: 275 grain SBD2
COAL: 3.760"
Charge/ Speed - 5 shot string
86.76 / 2745, 2773, 2750, 2767, 2760
87 / 2740, 2741, 2744, 2751, 2745
87.24 / 2773, 2754, 2765, 2750, 2767
87.48 / 2745, 2773, 2750, 2767, 2760
87.72 / 2779, 2762, 2782, 2771, 2774
IMR 7977
Charge/ Speed - 3 shot string
86.4 / 2776, 2780, 2767
86.7 / 2794, 2796, 2768
87 / 2803, 2795, 2826
87.3 / 2809, 2820, 2827
87.6 / 2854, 2833, 2808
87.9 / 2842, 2816, 2838