I have a JM 45-70, the GBL model.
I kind of shyed away from the 444 because of the slow twist (1/38 I believe it was) kind of topping out at 265gr or so bullets.
But I think in the later production the barrels were set up with Ballard rifling, at 1/20 twist. I would like to have one of those.
I like the 45-70 plenty, but there are enough examples of them blowing up, that I never lean on it pressure wise. The chamber area receiver are hollowed out pretty good....a little too good in my opinion, but it keeps the weight down.
The 444 has significantly more metal in that critical area.
