It was a 243/ .473" bolt face SA tang safety Ruger. I had my gunsmith, Joe Reid at Harry Lawson co here in Tucson, open up the bolt face and lengthen the mag box. No other alterations were necessary to make it feed the 338 RCM.

I really like those old tang safety rifles, have two SAs and one LA all with lengthened mag boxes. Two have timney triggers, one to go.