Answering the question asked:
There's basically three "levels" of .45LC load.
Cowboy stuff is the mildest - 200 to 250 grain, seldom more than 800fps. Anything can eat these. They're at 15,000psi or less.
"Modern defense loads" usually involve JHPs, 200 - 225grain, hovering around 20,000psi and between 950 and 1100fps. The Winchester Silvertip and Cor-Bon JHP defense load are the most common, they're also available from ProLoad and a few others. The S&W 625 can eat these all day long, ditto the various Rugers, Anaconda, etc. Too much of 'em will slowly stretch an SAA or Italian SAA replica; the best Italians can take a fair diet of these.
"The monsters": anything labeled "45LC+P" is up over 30,000psi, sometimes pushing 35k. Buffalo Bore's 325grain hardcast at 1,300fps is typical, and labeled "Ruger ONLY", and they mean it. Just one of these in an Italian Scofield replica and you've got a grenade...the solid-frame Italian SAAs probably won't blow up, but they'll break. The 625 can maybe take a few of these in an extreme emergency, but I wouldn't recommend it. The Anaconda is tougher. All of the New Model Ruger SAs can take these, as can the Redhawk/SuperRedHawk. Cor-Bon also sells 45LC+P, and say that if the same gun is chambered in .44Mag their stuff is OK...they're not quite as wild as the hottest Buffalo Bore load.
The Ruger SuperRedHawk in .454Casull can shoot all of these, plus the even wilder .454s.
The Anaconda is probably the most refined of the DA 45LCs. The Rugers are tougher, esp. the SRH in 454. The S&W is OK as long as you avoid the Buffalo Bore stuff, stick with Cor-Bon for the small number of .45LC+Ps that you carry strictly for bear defense, using the 20,000psi stuff for most carry.
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As to nomenclature: screw history. .45LC is what most manufacturers call it today. It's critical that newbies not pick up the wrong stuff, and not get confused at the gun store with the .45ACP - trust me, too many gun shop clerks will hand you a box of ACPs if you ask for ".45 Colt".
Historical quibbling is a BAD reason for steering inexperienced buyers wrong.