Consider the .375 Scovill, actually a .375-9.3X62, which has a bit more capacity than the Whelen case, or for that matter you could just try a 9.3X62, have all the advantages of the .375, with less expensive bullets all the way up to 325 grs. I have a 9.3X62 Husqvarna (which CGN has officially re-patched as the .366 Wagner) and I'm having a custom .375 Scovill built (actually a switch barrel of which the Scovill will be one) that will be ready to go later in the spring or early summer if all goes well. Ballistically the .375 and the 9.3 should perform similarly. The .375 will have a slightly shorter barrel, but with any given bullet weight and load, a larger but shorter bullet of the same weight will tend to have higher velocity, so the velocity will probably even out given the difference in barrel lengths. I had intended to go with the 9.3X62 as I like the cartridge, but my barrel maker doesn't make a .366 bore, although he does make a .375, and the last .375 he made, a .375 Ultra, shot like a varmint rifle.
According to my records, my working loads (.5-1 gr below maximum) for the 9.3X62 are as follows:
59.5 grs H-335.....250 gr Nosler AB - 2624 fps,
58.0 grs H-335.....270 gr Speer - 2500 fps,
65.5 grs H-414.....285 gr Previ - 2429 fps
63.5 grs H-414.....325 gr Norma - 2293 fps
66.0 grs VV-N550.....285 gr Previ - 2467 fps
64.0 grs VV-N550.....325 gr Norma - 2324 fps
I anticipate that the velocities from the .375 Scovill will be similar.
