I have 3 single action 45LC revolvers. One is a Ruger Blackhawk, one is an Italian SAA clone, one is a Ruger Old Army with a conversion cylinder. I was reading an article about an RCBS SAA boolit in a pdf sample of I think it was Handloading Magazine, and in the article they gave loads in 3 different pressure ranges, 14,000cup, 20,000cup, and I think 30,000cup (for RBH only). In the article they say the 20,000 loads are only for modern American made revolvers, and it got me wondering, my Italian gun is made by Uberti, was made no more than a dozen years ago or so, and has a brand new barrel & cylinder in it (made by AWA-USA inc). Can that gun handle the 20,000cup loads? If so, or if not, when trying a load, how can I tell if it's too hot a load for the gun? I mean if I have a load that's safe in the RBH, but not so in the other 2, will they show signs of over pressure in the 2, but not in the RBH?
Of the three guns, they all have different length cylinders, with the Blackhawk being the longest, and the Old Army with conversion being the shortest. When seating a 452423 or SAECO 458 in the crimp groove cartridges loaded into the conversion cylinder are exactly even with the end of the cylinder! In the instructions that came with the conversion cylinder they say to only use black powder loads, or smokeless cowboy loads that are in the same pressure range. These conversions are made for a number of different guns, most of them Italian BP revolvers, as well as the ROA, and I know the imported guns are of questionable strength, but the ROA's frame is made from the same stainless steel as they use for any of their stainless revolvers, and the conversion has fairly thick walls, and is also made from stainless steel, so what are the chances that the conversion in the ROA can stand stronger loads than other guns with conversions (the manual is the same for all of them), and they just don't say anything different for the ROA for lawyer reasons? If it can, again, how can I tell when it's too much?
I'm really asking more for academic reasons, as I tend to load light as I'm not hunting with any of them. So far I've been using Trail Boss, and loading only 4.2gr which is a fairly light load, and doesn't even fill the case half way, so I tried loading some with PSB buffer in the cases, only enough to be VERY slightly compressed when the boolit is seated (basically just enough so the buffer and powder will stay put, and not get mixed together), will the buffer make the load's pressure go up much? Should I avoid shooting the loads with buffer in either the ROA or Italian gun, and leave them for the RBH, or should they be light enough for any of them?
Sorry for asking SO many questions, and thanks for any answers!