Author: britrifles
Subject: Optimal Charge Weight Test
Posted: February 04 2024 at 12:24pm
I’m still dissecting the results of this test. Found something rather surprising.
Subject: Optimal Charge Weight Test
Posted: February 04 2024 at 12:24pm
I’m still dissecting the results of this test. Found something rather surprising.
Charge weights of 40.0, 40.3, 40.6 and 40.9 grains had a vertical extreme spread of the 12 shots fired of only 1.8 MOA. That’s less than the height of the 10 ring of the Mid Range Target. That is a very tight spread for a 0.9 grain charge variation.
The other interesting observation is the horizontal spread collapses at the higher charge weights. Not sure if that was a coincidence, or barrel vibratory response.
![]()
Clearly, the midpoint here is an accuracy node. I’ll shoot some test ten shot groups with 40.5 grains.
Charge weights of 39.4 and 39.7 grains grouped very poorly.
