I'll offer another solution, but first a caution. Ruger has been/is replacing their SA line with 'New Models' and all are not capable of the over-rated loads of previous models. The Redhawk, available now in both .44 Magnum and .45 Colt, is as 'capable' as earlier models.
I would offer for your consideration the two S&Ws of mine pictured below, a current 629-6 in .44 Magnum, sporting the S&W .500 Magnum monogrip ($35 from S&W Accessories) for recoil control, and the 625 Mountain Gun in .45 Colt sporting Ahrends square conversion cocobolo finger-grooved stocks ($66 from Ahrends, inc s/h.). The 625MG is in and out of production - check dealer stock. I think Lipsey's, a distributor, had a batch made for them.
Either will run from $650-$700 new at a dealer. The only improvement, post break-in, is perhaps a spring change. S&W also has their 'Master Trigger Job', a true bargain - for <$200, express handling & inc s/h. They will both breakin to have fine SA triggers - and decent DA triggers. Believe me, they both make great plinkers - and great protectors. They will be fine for hunting - if 4" handguns are legal in your state. The 6" 629 looks the same, except for the barrel length, if you need more barrel.
As to ammo... if it comes in a commercial box and states .44 Magnum, expect a long life in your 629; same with .45 Colt and the 625MG. Over loads - and your neighbor's reloads - should be avoided. If the normal caliber loadings aren't enough, get a hotter caliber.
The .44 Magnum will also chamber .44 Specials and .44 Russians, although you need to clean the chambers before going back to .44 Magnums. The Magnums are available on Sundays at Wally World; the Specials are available at 'Academy Sports' locally, too. For .45 Colts, you need to visit a gun store. The MG will also chamber .45 Schofields, if you can find them. I reload... and have all of them.
Now, if it has to be a SAA clone - get a Uberti - or, if you can swing it, a US Firearms 'Rodeo' is better than a Colt, albeit in a plain/utilitarian finish. Certainly less expensive... just over half!
Stainz