HUH, i didn't see a refernce to the Paco Kelly site anywhere, One thing this site shows you is that you that you can use Unique for colt safe loads all the way up to these heavy rifle loads. So just play with some Unique and figure out how hard you want to be hit back.
I assume the disclaimers on the website referenced are good enough, but just in case these are not my loads, I always stay under published maximums from recent powder manufacturers publications. I think the writer of this information does a pretty good job of explaining things and how to use the information. Its a long article but worth the read.
https://www.leverguns.com/articles/paco/45coltlevergun.htm
If you accept and apply the informationin this article, and decide your 45 colt rifle of recent manufacture and in good working order is adequate to shoot ruger only loads. Then you open yourself up to a wide range of loads with some very large bullets. Basically near 45-70 loads. But only you can determine if your rifle is up to the task. Read what he has to say.
It is my experience that any standard factory 225 gr colt load should at least make 1000 FPS in a 20in barrel. As will most factory 250s. Heck I have used Buffalo Bore colt safe, low flash, low recoil in my 2" taurus total titainium that makes 820 FPS in the taurus!!! Not hard to imagine that 1000 FPS is attainable in a 20 in rifle. Most Ruger only
starting loads will easily make 1300-1400 FPS with all but the really heavy bullets, and be fairly pleasant shooting loads.
The only reason I looked into these rifle loads was to develop a hunting only load for my Marlin 24" 1894. I don't want to put my old body and precious little rifle through a constant diet of these hard hitting loads. I shoot loads from top of the colt loads or the starting ruger only loads for fun. But it is also fun to use a light load that takes a while to ring the steel too.
I have an H110 load that is actually at the starting load of a "ruger only load" with a 240 gr XTP that exceeds 1800 FPS in my 24" Marlin. I have also purchased what appeard to be this exact load from a cutom reloader as well. For me too though, it is the last pound of H110 I will ever buy. It jars my teeth the recoil is so sharp, and I dont like the way it feels in my revolvers either. I am going to try it in my 357s and see if I like it better. Hate to not use it all up.
4227 has become my go to powder for the 45 colt, 401sl, etc.
However, I do have an enforcer 45 load that is a few tenths of a grain under max "Ruger Only" according to the 2020 Edition 8 Western Manual that shoots less than an moa and does 1950 FPS average of 5 rounds in my 24 in marlin 94. So for hunting thats my load. My vernier sight is set to that load at 100, 200, and even the overly optimistic 300 yards. I like to take the little rifle out on bright sunlit days so i get as many hours as possible with my old eyes. A scope is just an abonmination on a 24" octagonal barreled lever action rifle RIGHT?
But yes they HURT. I slip a limpsaver slip on over the but when I shoot these at the range, and it actually helps.
But its a lot more fun to lob 250 grains of lead into that steel and get the ping long after you pulled the trigger anyway. I only looked into these hot rifle loads for hunting, its sometime fun to go out with it, poarticularly during doe/spike season. They do shoot good in my redhawk as well though.