Larryo,
I've had a few 1886 rifles and carbines in .40-82 WCF, as well as an 1885 Highwall single shot. It is a GREAT caliber. Winchester actually considered it their first .40 caliber express round. It is a fast and flat shooting caliber and great for any medium size game, up to and including elk. It's a fairly easy and inexpensive cartridge to reload and you can make brass from .45-70. You do have to pay close attention to matching the size of the bullet to the size of the bore, which means the same bullet diameter may not work in all three of your guns. Have fun.
Adios,
Buck