Velocity test on Hornady 50AE 300 grain ammo was 1257fps.
4 reloads average velocity was 1,223.5fps and we had good feeding and last round slide lock. This is a good load!
The Hornady ammo is $1.60 per round and the reloads cost:
Acme bullet 24 Cents
Large pistol magnum primer 4 cents
Powder 10 cents
Total is 38 cents a round
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https://www.youtube.com/watch?v=esvHDXkeEqo