Quote:
Originally Posted by gaijin
I use WST with cast .45 ACP loads.
I have found it to be temperature sensitive; very similar to Win. 452 AA (which has been extinct for years, but was a good .45 ACP powder as well).
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It's virtually identical to 452aa. It is reverse temp sensitive though, so must be watched if you are trying to hit a certain PF or shooting a lot around zero temps with max loads.
I ran a test on an 80deg day. I set 10rds in the sun, 10 in a cooler with ice & 10 left in the shade. The vel were about 25fps higher with 40deg ammo & 25fps slower with ammo near 110deg. Not a huge deal, but you should be aware.