44 russian is great if you only want to choose between a S&W DA or a reichs revolver.
I would look at all the diffrent guns that are available to buy then find the gun you like and work on that cartridge.
Nothing wrong with a S&W DA or a reichs revolver but theres lots of other choices.
Reloading is easy and you can get just about any brass or bullets now thanks to Jethunter and others that offer lead bullets.
Its important to to look at the bullets hardness some of the bullets i see people buying are way to hard a lead.
Thats why i like jethunters bullets he understands antiques and casts his bullets with that in mind.
Brass dont matter where you get it.
The only gun that was ever offered in 45 schofield is the S&W Schofield revolver, im pretty sure on that. The rest you see that shoot it like some WGs or the 476 RICs or SAA colts were never chambered in 45 schofield it just happens to fit in most 476 british guns and SAA colts set up to shoot it depending on the head space allowances.
I shoot 45 schofield in my original schofield first and second models. also in one SAA colt i have 3 cylinders for it one in 45 sch one in 45 Acp and a thrid in 455 MKI So it can shoot the longer 455 domion ammos out there.
SAA Colts are nice because Cylinders are easy to swap out and barrels can be unscrewed when there shot out if you plan to shoot alot as you say then a nice SAA would be a good start one with a duel caliber set up even better.

I shoot 44 Russian in original S&W DA revolvers its a great round and very accurate but so is 45 schofield if its shot in the right set up chamber throat and bore and bullets all the same Dia is key to good accuracy.
My vote is buy the gun you want and like then feed the gun.. Feed it
