I own a Uberti Remington 1895 in .45 Long Colt. I've fired some potent hand loads through it, but I find that lower velocity ammo is a tad more accurate. The hand loads were about 20 grains of W296 under a 225 grain bullet. I seem to recall that my old Speer manual stated that these rounds developed well over 1,300 fps at the muzzle. Back off the load to 16 grains and accuracy gets noticeably better, at the expense of knockdown power and penetration.
Likewise, I've loaded .357 Magnum with 23 grains of W296 under a 110 grain JHP. In my Rossi SRS (clone of the Winchester 92) with its 16" barrel, these consistently generate around 2,100 fps. Move up to a 125 grain JHP, and muzzle velocity drops to just over 1,900 fps. I love this rifle... Very light, very fast action and good accuracy. If I had to pick only one of my weapons to use for everything, I'd pick this lever gun. Best pack rifle that I ever owned....
(Edit: If you buy a Rossi Win '92, invest in a spare firing pin... This is the rifle's only weakness. I had one machined and case hardened as the original ones are not very durable)