Well guys I appreciate all your info. After this weekend I came to realize that Hodgdon is full of it with the claims on H4350. Put four rounds in the freezer. Double wrapped in freezer bags. Freezer was set to 32 degrees. Left for 6 hours. Took them out after we were done shooting. Had chrono set up etc. They were shot within a minute of leaving the freezer. Had an average of 226 fps loss.
But the PRIMERS were also frozen. So which caused a greater part of the discrepancy?
I never adopted a reason to believe Hodgdon's claims. Afterall, they have yet to provide an actual basis for any of them. But I do like Hodgdon powders.
I really believe you'd have to go warmer(than ambient) -with the powder only, and that this would have to be loaded locally. Otherwise you affect more than just powder.
If you went cooler with locally loaded powder, dewpoint condensation would have to be eliminated.
Mikecr, But if your loading for a hunting situation, wouldnt the primers be frozen? Everything else is at that temperature. Powder, brass e.t.c. I know how we tested is not an exact science but its the only we way we knew and for it to have that much fps loss is awful. We are hunting in December / Southeast Kansas which will be a hell of a lot colder than 32. So do you know of a better way to test it? Thanks
Before you imply evidence that Hodgdon's claims are false, you first have to isolate their powder in your test. Otherwise anyone less inclined to believe you would just point to the frozen primer as the cause.
I told you TWICE, in this thread, how to test it