The Colt Walker, as well as BB's modern cartridge guns have much faster twist barrels, and shallower grooves, intended to shoot bullets, and stabilize the longer ( heavier weight) bullets better. That CVA pistol, altho .50 cal., --- at least on the ones I have seen other club members own-- has a barrel made from rifle barrel stock, with slow twists(1:48 to 1:66), and deep grooves. They may shoot RBs reasonably accurate out to 50 yds. I would hold my breathe to see how well they shoot various weight, and length conicals. No One in my club tried shooting conicals in their copies of this pistol. The grips are not designed well to take the abuse of the heavy recoil generated by shooting bullets and/or heavy powder charges, unless you have small hands. Even then, the tang and barrel need to be glass bedded well to take that kind of recoil for any length of time.
I don't disagree with BrownBear's comments on killing deer with his .44s and .45s shooting lead bullets. These bullets retain plenty of energy, and their shape and weight insure excellent- if not complete -- penetration in any deer you are likely to shoot.
If you want the same performance shooting a RB, you do need to go to at least a .54 caliber barrel- and a .58, or 62 is better yet-- to get the kind of " whompability factor", that you see using bullets in modern revolvers. ( Consider the weight of the RBs in these various calibers, compared to modern pistol and revolver bullets.
.50 cal RB = 180 grains- about the same as semi-wadcutters in .357 cal. bullets.
.54 cal RB = 230 grains- about the same weight as a .45 cal. hardball round, or a hollow point .44 bullet( and more than 1/2 oz.)
.58 cal RB = 280 grains- a heavy bullet for the .45 colt, or .454 casull, or .44 magnum( and about 2/3 oz.)
.62 Cal RB = 325 grains- a very heavy bullet even in a .50 cal. Smith & Wesson Magnum revolver cartridge( and 3/4 oz. of lead!)
IF I could get enough VELOCITY behind a .50 caliber RB from a pistol, I would not hesitate to take a shot at deer with it out to 50 yds. But that short barrel is simply not going to burn enough BP- even 3Fg to come close to the velocities you can get even from a .44 spl. using factory ammo at 750 fps.
The only saving "grace" in FAVOR OF even a slower Soft, PURE Lead RB is that it flattens out and expands dramatically larger, even at slow velocities, in living tissue, than many of the modern bullets.
I would prefer a MLing pistol with a 10-12 inch barrel, carried on a sling, rather than on a belt, for hunting, and I would choose the .54 caliber, in a specially cut barrel, with shallow grooves, and fast- pistol-- ROT, shooting conical bullets. Then, I would feel comfortable shooting game like deer out to 75 yards- or about the same distance I feel comfortable using my .44 spl. revolver on game. Other opinions may differ. :thumbsup: