BillinOregon said:
That's one of the principal keys, along with stock configuration, anti-recoil technology and shooting technique. I have a long history of shooting very big boomers in modern calibers, and the recoil experience can be all over the map almost without regard for math and formulas.
But with a pure basic traditional muzzleloader weight is kinda the starting point. My 8ish-9ish pound Big Boar (haven't weighed it) is starting to eat my lunch with 140 grains of 2f and a PRB rather than a heavy conicial. I have an array of heavy 58 cal conicals and have shot them a fair bit. They make the same gun feel like an entirely different gun, the recoil is intensified so much more.
I suspect the NA Hawken Hunter is similar in weight. But there's also the point that the Big Boar's stock configuration isn't ideal for my long body and prominent cheek bones. Dunno the Hawken Hunter from an honest politician, but I could forecast a lot about the recoil simply by picking it up and shouldering it once.
In contrast my 58 cal GRRW Hawken fits me like a glove and tips the scale just over 12 pounds. You know you lit a fuse when you pop off 140 grains of 2f under a PRB, but it's nowhere close to painful.
One point worth pushing to the front from here in the land of lots of big boomers:
Folks here on the site are mostly old guys, getting older all the time. Old guys and heavy recoil has proven to be a very bad mix. The number of old guys I know with torn retinas from big boomer recoil should scare you spitless.