This is all very interesting. The buck I shot this year was broadside at 15 yards. He was shot through a rib at entry, through the heart and the ball went between ribs on the offside and came to rest under the hide.
It too looked like an igloo as Roundball described. Last year I took two doe with .45 prbs from a flintlock. One passed through, the other did not.
My load for each of these deer was 65 grains of 3f Goex.
I know each deer is different and results will vary. I suppose what prompted my query was the fact that my buck did not drop any blood (of course it's chest cavity was as full as could be). A lack of an exit wound could have been a hardship if the buck had been shot in a thicket and ran a bit farther. That's where my thoughts were when I began this thread. I am not knocking 45 prb's at all. I have taken 3 whitetails with them with 3 shots and all have expired quickly and humanely. I am just more used to having two holes in my deer instead of one.
Perhaps if this buck had been taken through the lungs, in place of the heart, the ball would have exited. :idunno: I really can not say. Maybe a heavier charge is in order if accuracy doesn't suffer (65 grains is what I have found the rifle likes best).
In the end, maybe I am thinking about a moot point as the load has been successful, thus far. :idunno: I just like a little red on the ground pointing the way toward my deer!
Thanks to each of you for your feedback. Please, if anyone else has field experiences to share, please do.
Thanks, Skychief.