Rebel, I had the same thing happen with an 1860 Army in 44. It bounced off about a 6 inch hickory at 15 or so yards. Sure surprised me!!!!
FYI, to all those who mentioned "bullets bouncing back" from hard targets. Even with a heavily loaded 1860 Army .44 loaded with 30gr of FFFg and a .451 diameter round ball-- things don't always turn out the way you expect them to.
DO NOT ever fire into an old TV picture tube. Now, you would think that a 140gr lead ball at 850fps would bust that glass and implode the tube. WRONG!It cracked the glass and I heard the ball whistle over my head. Of course, I could NOT leave well enough alone!!!. I went back inside and brought out the Walker and loaded a 60gr charge with round ball. This time the picture tube did shatter and implode, as I expected it to do the first time.
I have seen the .31, .36, and .44 cap-n-ball revolver loads fail with regard to penetration of, or performance on, "hard targets". For best performance on deer/game of similar ilk--you need to move up to the Colt Dragoons, the Walker, or a good solid .45 (or larger cal.) single shot, that can handle a 40gr charge or more. Some of the single shots can also handle big heavyweight conicals as well. Those are the pistols that you can depend on for "more reliable power".
The .31 makes a really nice plinker though... if the buck shot fits the gun, it is the most inexpensive cap-n-ball gun to shoot. And as far as some of those self defense comments go, I don't want shot with ANY size or caliber gun.
Shoot Wisely!
WV_Hillbilly