The side loading gate is the biggest problem. I shoot a Marlin 45/70 from time to time and that still be a problem on some days. I was considering a Winchester 88 but I have never seen on around her for less than $800, that said I have seen the semi-auto versions for around $400, I have been thinking of having one of those rebored to 358 win someday.
I'd consider the Ruger Semi in44 mag before the Winchester 100. It would sure do what you want one for. just checking a few internet sites I see them for about $500 for the plain vanilla and they go up from there.
