Agree 100% with SLT223 above. The only thing I would add because of the OP’s mention of back issues, is shooting full house loads in one of these rifles can be a surprise. It can be surprising how much recoil they have with a handgun cartridge. However, with you plan to use lighter loads I have little doubt you will be fine. And if you want to ramp up to Buffalo Bore/Underwood type max loads, you can get a slip-on butt-pad to help tame the kick.

Be sure and post pictures and a range report when you receive and get shooting.

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Possum—The other white meat!