Well I loaded up 10 of each at 3.0, 3.2, and 3.4gr using 1.04 inch OAL. Anything past 3.4 grains will start compressing the powder. Before loading any compressed loads I thought it best to chrono the starting loads. I want to see a nice linear progression before I start compressing. I also want to see if the loads feed and cycle properly.
Any guesses at to what my velocity will be at 3.4 grains? The previous bullet ran about 1065 fps at 4 grains. The new bullet was seated 0.015 inch deeper.
ID,
CSB-5 is a fairly fluffy disk powder. It is also fairly fast comparable to Titegroup/Red Dot. There isn't any real load data aside from what has been tested here on this forum. I agree that a higher charge density is generally best for uniform burn. We'll see where this starting data ends up.
Cheers,
Toby
Edit: Updated top charge from 3.6 to 3.4, oops!