08-16-2020, 09:28 PM
grayfox, Hodgdon lists 2702 velocity for 28.5 grains of CFE 223 as max and that is the highest one on their list. The next best is 26.8 compressed of H4895 at 2631, so RL17 is a contender.
The 27.7 load in my case, my rifle is at the edge of being compressed, and is possibly very lightly compressed and that may be indicated by the velocity spike.
As for ARC case capacity, it will also depend on where the bullet touches the lands on how much powder room is available so you would have to do an individual test to see how much powder you can fit in your cases. If you have some RL 17 and a fired case, and some 105's 107's or 108's let me know what you find out. The 108 ELD M would only permit 26.5 grains of RL 17 at 2.270" for me.
The 27.7 load in my case, my rifle is at the edge of being compressed, and is possibly very lightly compressed and that may be indicated by the velocity spike.
As for ARC case capacity, it will also depend on where the bullet touches the lands on how much powder room is available so you would have to do an individual test to see how much powder you can fit in your cases. If you have some RL 17 and a fired case, and some 105's 107's or 108's let me know what you find out. The 108 ELD M would only permit 26.5 grains of RL 17 at 2.270" for me.