To be honest, I've never heard of the 357 B&D until reading your post...so off to the interwebs I went. Interesting cartridge indeed.
My initial and totally unprofessional in the terms of gunsmithing thoughts are this....
Might be easier to buy a 44mag carbine, then acquire a 357 barrel and have the chamber of that barrel reamed to 357 B&D. One thing to take into consideration with that route is the barrel stock of a 357 chambered barrel may be smaller than that of a 44mag barrel. Not saying this is a fact, but definitely would need looking into. If that option is feasible on that aspect, I would not think any alterations of the bolt or even the lifter would be necessary??
As to the mag tube, I would not suspect a need to alter that either if the rifle is bought as a 44mag to begin with.
If a 357 barrel is smaller than a 44mag barrel the whole idea may be dead in the water absent the willingness to take on considerable expense. I would be concerned with safety to ream a 357 chamber if the barrel OD of a 357 is smaller than that of a 44.
My Win 94 Trapper has a fatter barrel than my 32Spl as well as my 375 Win.
My initial and totally unprofessional in the terms of gunsmithing thoughts are this....
Might be easier to buy a 44mag carbine, then acquire a 357 barrel and have the chamber of that barrel reamed to 357 B&D. One thing to take into consideration with that route is the barrel stock of a 357 chambered barrel may be smaller than that of a 44mag barrel. Not saying this is a fact, but definitely would need looking into. If that option is feasible on that aspect, I would not think any alterations of the bolt or even the lifter would be necessary??
As to the mag tube, I would not suspect a need to alter that either if the rifle is bought as a 44mag to begin with.
If a 357 barrel is smaller than a 44mag barrel the whole idea may be dead in the water absent the willingness to take on considerable expense. I would be concerned with safety to ream a 357 chamber if the barrel OD of a 357 is smaller than that of a 44.
My Win 94 Trapper has a fatter barrel than my 32Spl as well as my 375 Win.