RE: working up a load?
A word of advice from someone who has shot an elk. Go big, lol.
I shot one 450-475 lb cow here in NV in 2005. I hit high and actually broke her back. I expected the bullet should have exited, but it didn't. The range was 75 yards.
The Gun? CVA Bobcat 1:48
The load? 370 GR T/C Maxi Ball; 80 grs Goex 2f.
If I go about it again, (should be able to draw a ML cow elk tag next year), and since I have changed to a 1:28 inline, I will probably stick with a 250-300 grain Sabot, or a bigger conical, and a little more powder, though 80 grains was sufficient, that 75 yards was about what I figured should be the max range with that load.
Later,
Marcial