WB
I’ve had great luck using AA#7 and Tight Group
Tuesday, January 09, 2024, 08:53

With cast bullets in 10mm. Mostly in a Glock 20 type platform with 6” broach cut rifled barrel. I’m shooting mostly 0.401” 215 gr. FNGC, but some 230 gr. too. The polygonal types need a much larger diameter cast bullet to work best, like 0.403”. If that will chamber reliably. That’s one reason they don’t recommend cast in that type of bore. FWIW

Kase is the 10mm Guru.


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