Originally Posted by Indy245
I'm looking for reloading and fire forming data for .338 lapua ackley improved.
I plan to shoot 300 gr. MK. It has a 29" barrel, 5R 1 in 9.4 twist.
Shoot the 300 Berger and Retumbo. I'm at 101g Retumbo and 2976fps in a 29" Rock 5R 10 twist. Sweetspot in usually in the 2950 to 2976 fps MV range for most.
Edit: should mention I'm shooting F215M primers and Kirby has found that they are generally not as hot as the standard primer and typically take a grain or so (in this chambering) more powder than the standard F215 primers to attain the same velocities. That may be why most folks are running a 99 or 100g load at similar velocities to mine. I've got 3K F215M primers, so that's what I'm going to use.
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