RE: 100grains to small for elk
Lots of folks out here use 100 grain charges for elk hunting. Combined with a good conical, this will work well out to 150 yards or so. I am told by the owner of the Shootin Den in Colorado Springs that the most popular elk load out here is currently a 348 gr. Powerbelt ahead of 100 grains of Triple 7. You might get less recoil, however,out ofan equivelant velocity charge of BM3 - or even loose Pyrodex.
The 385 grain Buffalo bullet is also worth trying with a 100 grain charge. One of the most experienced elk hunters I know uses this bullet ahead of 100 grain of Pyrodex Select. Has a cigar box full of mushroomed bullets recovered from elk over the past 40 years. They work!