Bradley Walker
dboyles said:With the oppressive summer heat I've been doing more shooting at 100 yards, and recently worked up the following load that I have had good luck with in a couple of outings. This is in my bolt gun with a 1:8 20" Krieger barrel:
52gr SMK
23.7gr H322
Rem 7-/12 primer
2.230" OAL (about .010" off the lands)
Lapua brass, FL sized with about .0015" neck tension
edit: I went up to 24.7gr of H322 in testing with no pressure signs, but had better luck in the 23.4-23.7 range. Also tried using Wolf SRM primers in the above load, but results were dramatically worse.
I can confirm this load testing. I am testing EXACTLY the same configuration except I am using LC brass.
At 24.5 and 25 I was getting massive pressure signs... I would say I need to be between 22.5 and 23.5. I am going to take everything apart and try working up to your range of 23.7. I am sure the thickness in the brass will need to be addressed. I am not sure were Lapua compares to LC in case capacity.
I am going to continue testing using my Savage bolt gun with the 20" Benchmark barrel off the bipod. Then try it in the AR-15.
H322 is proving to be much faster than V133/R10x/AA2015 in my loads. By as much as 2 grains...