At the risk of stating the obvious, with a recoiler, you
have to pocket it tight. If you so feel the desire to bench it, give it some sling tension to drive it into the pocket. None of this rear bag silliness, that’s only gonna hurt you.
Better still, shoot it without a front rest
at all, tight in the pocket, best done with a stabilizing sling. If you shoot it from sitting or better yet, standing, pocketed tight, the recoil is just fine, because your torso just flexes backward. That’s actually where the blob guy comes off second best
Guess my point is, if you go down the light gun 45/70 route (with a decent amount of powder behind it), shoot it right, then it’ll be fun, and addictive.