Been using 200gr cast lead wadcutters off TM, with 6.5gr of Trailboss. That combo gave me around 1050 fps.
Now I am experimenting with 174gr Hornady RN Interlocks. They seem to want a lot more powder... Up to 9.0gr of Trailbos and only getting 970 fps...
Anyone done testing between Federal 215 magnum primers and CCI 250's ? Would be keen to hear what speed differences were.
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