Looking for QL data for the 45-70 using the 350 gr. Barnes TSX FB loaded to 2.800" and a MAP of 31000psi
IMR 3031 would be my first choice, but have a good selection of powder to choose from.
One has recently come into my possession and has made a couple range trips. No earth shattering results as yet, but the 210 NPAR is looking promising. It looks like Leverevolution is going to generate the highest velocities and Varget is in the lead for accuracy.
In the old days a big bore...