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Mine is an FN Mauser Supreme, with 24 in. Barrel. I shoot 200 gr. accubonds in front of 71.5gr. of RL-26. It kills moose very dead!

375 Ruger recoil is brutal. I had one and sold it. On the plus side, load development was easy, with 270 gr. Barnes LRX.

On GRT, you can manually adjust case volume, to depart from standard case volume.

I do not have QL, but I use Gordon’s Reloading Tool, which can be downloaded for free on the Internet. Your cartridge sounds like a 6.5-06 AI or very close to it. That would be a very good starting point.

In addition to the points outlined in post#3, please stipulate a 24 inch barrel length.

IMR 4451 is in the same burn rate range as H4350, and IMR 4831 is in the range of H4831 and H4831SC.

Thanks, but the Rhino bullet is not long enough, at 1.127, to achieve a COL of 3.224. The case is 2.22 in long. 3.08 in. is a more realistic COL. This will also translate into less internal volume, and eliminate most of the really slow burn rate powders. Also, you set the MAP at 42,700...

There is no data available for this specific bullet. I know that Rhino recommends using data for traditional bullets of comparable weight. This is for a 9.3X57, an obsolete cartridge for which there is scarce published data. The good news is that the rifle is a Husky 146 built on an FN...

What is the twist rate of your barrel? I have a Vanguard 2 with 1:10 in rate of twist and, although I have never tried the Barnes 115, i am under the impression that a faster rate of twist is required to stabilize those bullets. Am I wrong?