Re: 270 Weatherby Loads
Ben, I was able to replicate Weatherby Factory 150s w/ R22.
Weatherby Brass, Federal 215 GMM Primers, 150 Grain Hdy SPIL Flat Base, and ***71*** grains of R22.
*** This was a quite warm load so, please don't start that High.
The R22 Load shows no pressure signs and bolts smoothly after firing.
I was able to Replicate Factory Ballistics w/ IMR7828 but, the Bolt was sticky and primers where starting to Flatten.
R22 is very close to what Weatherby loads their factory rounds w/. I weighed the Wea. factory charge at 71.5 grains of powder. Not sure what kind Weatherby uses looks like R22 but, I think it may be Norma MRP.