I got a Ruger M-77 rifle that a man had a hunter class bench rifle made out of it about 20 years ago. Before he could use it he died. His wife just started getting rid of his stuff last summer. This rifle is in 30X47 cal. I do not know what kind of barrel it has on it but it is chrome moly. From what I can tell from pulling a cleaning rod with a tight patch through the bore it has a 1 in 12 twist. It has a Canjar trigger of 1 1/2 pounds. I got the dies and a bunch of cases. Some made from Match Federal Nickel 308 and others in WW 300 savage. So far 41 grs. Varget in the Federal case with CCI-BR2 primer and a 168 Sierra Match King OAL 3.208 is a bug hole shooter. I used it to kill a deer this year with 42 grs. IMR 4895 Federal case, Fed. 210M primer and a 150 Sierra game king. I am just looking for some advice on some other loads and others experience with the caliber.