I keep loading my load from lot to lot. Only powder I have seen dramatic differences in is Rl 22, thats why I now use Norma MRP. Same powder but consistent from lot to lot.When ever you get a new lot of powder, do most of you start at your current charge and shoot a few groups at .2 or .3 grains around that charge too see if anything changes? Or is it a moot point and just stick with your current charge
The powder is IMR4895
Thanks
Got caught years ago with RL22 in the 257 wby because of case lot differing. One of the main reasons started buying larger quantities of the most used powders.I keep loading my load from lot to lot. Only powder I have seen dramatic differences in is Rl 22, thats why I now use Norma MRP. Same powder but consistent from lot to lot.
4895, 168-grain SMK, 24" Barrel, 68.2 grs case water overflow capacity, 3.290" COL
Constant Velocity; about ±0.8 grains:
Ba=0.5044; 48.27 grs; 43847 psi; 2633 fps; 1.311 ms
Ba=0.5200; 47.42 grs; 44157 psi; 2633 fps; 1.308 ms
Ba=0.5356; 46.63 grs; 51051 psi; 2633 fps; 1.304 ms
Constant Barrel Time; about ±0.9 grs:
Ba=0.5044; 48.35 grs; 44046 psi; 2637 fps; 1.308 ms
Ba=0.5200; 47.42 grs; 44157 psi; 2633 fps; 1.308 ms
Ba=0.5356; 46.53 grs; 44251 psi; 2628 fps; 1.308 ms