I fired my 44/40 Henry in an N-SSA team match for the first time two weeks ago and I now know why the 1866 had a wooden hand grip added to the barrel. After firing over 20 black powder rounds in 3 minutes, the rifle barrel was too hot to hold and the magazine tube was about as bad. I needed to put a glove on my left hand (right handed). Just a general comment on the Henry design.
Rich