I use 57 grains of RL15 under 286grns Barnes X and that works very well. Originally I think it was Ray Atkinson off AR who suggested RL 15 and it seems to work very well for a number of different people.

Speer suggest a starting load of 60grains to a max of 64grains of IMR4350 for there 270grain SP, but I was unable to find a load that produces a decent group with that powder..

Regards,

Pete


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