Well, I got to start recording OAL's! Finished off a box of Hornady 125 grain JHP, with those bullets being about 35 years old (just didn't like them in my Model 19!). They fed perfectly. Bought a new box of Hornady 125 grain JHP that appear almost identical. Don't know why, but about half would not cycle.
What was different? The old ones had far more lead exposed and the new ones had the copper jacket go closer to the HP. Shape was about the same. Will try some more this evening, and will lengthen them a tad. If I have any issue, I suppose I'll just move to .357 cases for extra length, as it appears the Henry wants more length!