i’m loading to 30gr for the comp this weekend. That will put the barrel’s round count at > 180.
My plan:
-shoot the comp and get my ass kicked
-clean the rilfe
-retest 29.4 to 30.4 in 0.2gr increments (10 rounds each)
-post results
I threatened back in Feb I would do some testing and post some results at a later time. Well,… here we go.
This is where we were after the first 80 rounds:
Lapua, CCI450, Varget, Berger Hybrid 105
29.4gr = avg 2728, sd 5, es 13
29.6 = 2749, 4, 10
29.8 = 2781, 11, 31
30 = 2806, 6.7, 15
30.2 = 2814, 12, 31
30.4 = 2848, 8, 19
The rifle now has 3 one-day club matches and about 500 rounds now. It has changed quite a bit since the original post in Feb.
Components unchanged as above, I was loading 30gr. A typical 10 shot string would yield the following results:
mean 2890
SD 10
ES 30
I went back to the range with some reduced loads and obtained the following data:
On the target, there was vertical stringing with the 29 and 28.5gr loads, while the 29.5gr load looked pretty good. I can only resolve 5 of the 10 shots on the target, so that’s the best I can do with the target analysis. The other 5 shots are in there somewhere!
I’m nowhere near as good a shot as some of you guys are, but I think I can improve on my results at competitions with this load.
So, I’ll probably stick with 29.5gr unless something changes over the next 2,000 rounds!