Originally posted by RIP:
IBT,
The .395 Ruger max is intermediate to the .395 GSC-H&H-Ackley-ized (greater) and the .395 H&H-Unadulterated (lesser).
I estimate the .395 H&H at 95.30 grains of water gross.
The .395 Ruger Max is about 102.00 grains water gross IIRC.
Since you mentioned the 340-grain GSC bullet and barrel length comparison in the .395 Ruger Max:
QuickLoad shows RL-17 to be an excellent powder for the .395 Ruger Max:
80.5 grains RL-17 is a 100.6%, barely compressed load, with presure of 62,319 psi, barely below the maximum allowed of 62,366 psi.
Barrel length -vs- muzzle velocity, .395 Ruger Max:
26": 2667 fps
24": 2627 fps
22": 2581 fps
20": 2529 fps
18": 2469 fps
I can get 2577 fps with a 24" barrel in the .395 H&H with same 340-grainer and 76.4 grains of RL-17 for a 103% nicely compressed load at 62,181 psi.
That too is below the .375 H&H maxpressure of 62,366 psi.
That is 'puter ballistics only, yet to be proven.
RL-17 must be tried.
It works great in the 12 Ga From Hell.
Other RL-17 loads in .395 H&H-Unimproved with 24" barrel:
330-grain S&H FN: 2609 fps @ 62,104 psi (76.7 grains)
310-grain S&H HX: 2633 fps @ 59,295 psi (75.0 grains)
2350 fps with 410-grainer is possible in the 'puter, but can a home-made-gas-checked-cast lead boolitt stand it in the .395 H&H???
That is a classic .416 Rigby KE-MV from a featherweight .395.