Originally Posted By: SShooterZTo a point I agree on the seasonal temperature thing. I haven't experienced it shooting from 0* - 100* with most powders.
Where I do think it comes into play is how hot you shoot the gun. When popping colony varmints on a hot day, I have seen some popped primers when the temps were searing. I didn't see that with a powder like Varget for instance.
Now, without knowing/remembering what the internal pressure was for each load, I have no way of referencing which was a high pressure load, etc. so there could have been various variables. I'm just saying I saw it was the likes of a BL-C(2) and not a Varget, which for all intensive purposes in the .223, should have somewhat similar pressure numbers. (Per Hodgdon's site, I have no way of actually testing it.)
As for the topic I have seen H4895, RL15 and Varget all work well in the .308 Agree with these three powders. I like H4895 the best. My buddies like Var get. IMR 4064 is not a bad choice either.