Wow. I've been loading for a 52 lately. Bought one from a range pal . 0% difficulties loading for it . No problems at all. The zombie thread from 09' would lead you to believe that is was impossible to load for the thing, but nope. Not me. Hope I don't jinx myself.
The oddest thing is the lower case bulge. If you look at the chamber it does not support the lower end of the case leading to the bulge. I noticed it first on some "once shot" brass I was using. Big bulge , bad , didn't like that . Went to using new brass and that is cut to a minimum, but its still present after 3 or 4 reloads. I'll keep on cycling these cases till the bulge becomes extreme . Curious to see how far I get.
I'm using Star Line brass or PPU , mostly star line.
2.9 gr of BE and a grab bag of 148gr HBWC, but I've shot a few hundred DEWC as well. All work fine , Speer and Hornady seem to be the most precise, but I've been having good results with Delta Precision as well.
The 52 is pretty near amazing . Mine groups in straight lines as my hold is a bit of a see/saw, but it stays in the black for the most part but then, when you least expect it , wham you'll have a flyer. Its a very sensitive gun. The least mistake and your wondering what happened to your score.Lots of fun in the process.