Loaded up some 250 A-Tips with RL50 from 86gr to 92gr in 0.3 gr increments. Started to feel some crunching at 91.1gr, but very little resistance, at 92gr I had to adjust my seating micrometer 2 thousandths.
AI AXSR 27" 1:8" and 338 Ultra SR
Trim Length 2.489
Case volume (fired case, filled to brim): 103.84 gr
BTO: 2.8450"
OAL: 3.6980"
CCI 250
53* F, 21% RH, 28.04 inHg
No pressure signs at 92 gr, Id like to see how much more velocity I can get out of it, but my goal was 2800 fps, and I get that at a pretty low pressure. Whereas, the Berger Ammunition 300 NM 230 Hybrids is 2883fps 19.4 SD (54 rounds fired over the chrono), and I get some minor ejector swipe and flattened primers.
85.7 | 86 | 86.3 | 86.6 | 86.9 | 87.2 | 87.5 | 87.8 | 88.1 | 88.4 | 88.7 | 89 | 89.3 | 89.6 | 89.9 | 90.2 | 90.5 | 90.8 | 91.1 | 91.4 | 91.7 | 92 |
2641 | 2707 | 2642 | 2721 | 2704 | 2705 | N/A | 2730 | 2719 | 2742 | 2732 | 2748 | 2751 | 2786 | 2812 | 2818 | 2788 | 2828 | 2823 | 2854 | 2847 | 2844 |