05-05-2022, 02:19 PM
Quote:AR comp actually increased MV as temp went down from 68-32 deg, which is a switch.
Johnnys Reloading Bench did a temp test in one of his videos, using only Alliant powders, testing both the 223 and 308. With AR-Comp he got the same MV decrease with higher temps that your test showed, in both cartridges. The RL 15.5 powder MV decreased in the 223 cartridge as the temp went up but not in the 308.
About the 4:50 mark is where he starts showing the results.
https://www.youtube.com/watch?v=DfWdGD_ko9M