Got a large supply of Herco and I'm looking for load data for 155 and 180 LSWC bullets. I'd like to get 1100-1200 FPS out of a 5" barrel. Perhaps one of you still has an old 80s/90s Alliant/Hercules Reloader's Guide when 10mm was new and popular. Already talked with Alliant; they only have data for jacketed bullets and nothing using Herco since they are pushing newer powders.
I hope you dont try many at that velosity, with cast . the 10mm is kind of picky I tried about 8 powders and settled on 2 that works Unique and titegroup I would guess Herco would be about like Reddot and if so you wont hit a PU truck with the 10mm
The oldest Alliant data I have is 1998. They list Herco with jacketed bullets but not for lead. The only powder they used for lead bullet data is Power Pistol.
I hope you dont try many at that velosity, with cast . the 10mm is kind of picky I tried about 8 powders and settled on 2 that works Unique and titegroup I would guess Herco would be about like Reddot and if so you wont hit a PU truck with the 10mm
Herco is quite a bit slower than RedDot. Herco was popular back in the day for lead bullets in the 9mm. Lee shows 6.6gr-7.2gr w/ a 190gr jacketd. Use that as a guide for 180gr lead bullets. Herco is a bit slower burn rate than Unique & you could use Unique starting data & work up.
10MM Herco lead bullet load data ?
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