260g AB vs. 260g NP in .375

[Chilly Willy]

I've started loading for my new 375 RUM and am going off of Hodgdon's data which states that the max load in H4350 is 92.5g for the 260 Partion, however I am loading the AccuBond in 260g. How will the max PSI of 62,900 change with the different bullets? I know they leave a 10% buffer for the max load but the 270g SP max's out at 95g of H4350 for a heavier bullet???

Thoughts

 

[todbartell]

buy a chronograph

start low and work up slowly, I wouldnt go over 2950 fps if it was me
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