In my guns, the Rapine "Trashcan" is an extremely accurate bullet but it is sensitive to what lube you use and sadly, not in production any more since Rapine passed away. Moose Moulds has picked up that design and others and makes minie molds of very high quality. I wouldn't hesitate to use a Moose mould. The Rapine 500 has been a disappointment in every gun I've tried it in to date.
https://moosemoulds.com/products/
A very close second to the Trashcan is the RCBS Hogdon. It is not as sensitive as the Trashcan to lube and shoots quite well in every gun I've shot it in and Moose makes a version of it as well. I have both moulds, RCBS and Moose, and there's no difference between them in terms of rifle performance. I get quality bullets from both molds when up to operating temperature. If you look at the group descriptions in the pix I posts, you'll see 2 of them are with the RCBS Hogdon and one is the Rapine Trashcan.
Of the Lyman 575213 and RCBS 500, and I have both, neither delivers what I'd term acceptable accuracy, but I'm very picky. Some folks get good results, but I haven't found the right combination for my guns yet.
One further comment on moulds. There are those who are tempted by the price of Lee moulds but I've found that their
minie moulds are uniformly dubious as to durability and quality. That said, I currently have two of their version of the Trashcan which they have discontinued. Both cast at .575, I have bought 3 of them in total, but one is already useless as the core pin plug is mounted on a flimsy piece of sheet metal that warps easily and leads to galling in the mould which has rendered that mould useless. I keep the remaining two moulds for only one of my guns which takes a 575. At the point where another one fails, I'll go with Moose on the replacement. For what I paid for the 3, adding in the frustration, I would have been better off with Moose from the start on this one. Lee has other designs and I've tried them but none delivers what I term as acceptable performance either in the casting process or at the range. I've found Lee
minie moulds to be an exercise in frustration and I simply won't use or recommend them to anyone. With that in mind, I strongly recommend anyone trying to get accuracy out of their minie rifles to go to Lodgewood for a sampler of bullets. Try them before purchasing a quality mould and sizing die. It's a great way to save money in the long run.
So why purchase minies from Lodgewood? Simple- the guy casting for them is a N-SSA member and competitor with Civil War arms. He knows how to make a quality minie bullet and doesn't scrimp. Other commercial sources can't make the same claim and I've seen the results and it's often disappointing. Track, Log Cabin, etc, they're great for patch round ball, but there is only one source for quality minies for testing and it's Lodgewood.
Like I said before, there is no rocket science or secrets to getting a minie to shoot quite well. All you have to do is listen and do what we've done. We're not hiding anything. One further comment on this line, and this is coming from a competition shooter, any discussion on accuracy will always include group size and that's why I post pix of some groups I've shot with minies. Group measurement is the gold standard by which we gauge how effective we are with a load/rifle combination. I often hear- "I can hit a 12in gong at 100yd" or "I can kill a deer". Both mean nothing in competition and neither is a reliable method to measure success with your rifle and load in the search for what's best. MOA or Figure of Merit are the standard to use.