I wouldn't even consider another 40-90 unless it wore a bull barrel, and even at that I suspect the muzzle blast would be significant. 94 grains of powder churning thru that 40 caliber hole, brings to mind the old axiom for every action there's a reaction.
My 40-90 will wear you down after just a bit of shooting, it weighs just a tad over 10 lbs.
