If you have a small ring Mauser the load data you want for usage in them will usually have that information with it. Sierra #5, Lyman 48, Hornady #7 and my favorite Accutate Powders #2 all have the data for usage for under 46,000 CUP loads. As I said the Accurate load data is my favorite because their loads go up to just under the 46,000 CUP limit where the others are really conservative on their loads. But again I can understand that because most of these rifle are over 100 years old and who knows their condition. I have a few military Swede Mausers and one that I sported that some Bubba had already started hacking on. I left the 29" barrel on it because with Max loads of AA 4350 from the Accurate #2 manual I can still average 2950 fps with 120 gr bullets and 2800 with 140 gr bullets with super accuracy.