From what I've heard, all the H&R barrels are made from the same steel.
Not true, H&R rimfire and shotgun barrels are 1137 mild steel, centerfire rifle barrels are 4140 alloy, there's no difference in SS1 rimfire, SB1 or SB2 rifle frame dimensions, the only difference is what they're made of and the fact that each barrel is mated to it's respective frame when fitted at the factory, they aren't one size fits all, so there can be big differences in fit, and of course firing pin location on the SS1 frame. The only modern H&R frames that have been made to accept only its respective barrels were/are the Sidekick and SB2 shotgun frames.
Tim
ps.....stainless barrels are 400 series with magnetic qualities.
