Greetings @Blackfern,
I have been using the 145 grain flat base Hot-Cor for 600 yard F-Class shooting and they shoot very well. I am loading 41 grains of AR2206H (Hodgdon book max) in Lapua cases with Fed 410 primers. Velocity in a 26 inch barrel is 2,800 fps. The factory BC of 0.416 checks out with my chronographed muzzle velocity and the 600 yard velocity from our target system.
Regards Grandpamac.
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