Don't know. The velocity was not changing much which tells me I have a ways to go before max in this rifle. When the velocity is not changing much then IME the averages can go back on forth, especially with only 3 shot groups.
Also I have noticed that with the RL powders the standard deviations will stabilize when you get closer to max and the groups generally get better. At least that is what has happened with RL22 and RL25.
This is the list of the velocities
52.5 grs - 2609, 2629, 2609, 2614
53.0 grs - 2619, 2609, 2624
53.5 grs - 2645, 2656, 2661
54.0 grs - 2640, 2656, 2650
Edited by sakomato - February/09/2010 at 21:54