Henry receivers are not made of brass... they are made of brasslite.
A combination of steel, tin, and some form of brass"ish" alloy. What I'm trying to get at is, henry says that the alloy receiver is just as strong as ANY steel receiver levergun. Heck the receiver is good to shoot 45-70, 30-30, and 44 mag, the only difference being a different chamber reamed into the barrel. Should be able to hold a hopped up 45C.
Big debate on the 45C holding more powder then a 44mag and therefore must create more pressure with a compressed load of the same powder right? Well not always... the bigger chamber and caliber spreads out the CUP more, like surface area wise.
Anyways, she shoots fine, no pressure signs, to hard extractions, not even case lengthening after 6-8 high pressure reloads.
I'll let you know if anything happens, but it's safe to say;
The henry big boy needs more credit then it gets.
I would pit this up against any marlin, winchester, rossi, remington, or whatever else is out there for strength. These things aren't just for show. The just look pretty.