Ade, I have used several mausers with the stripper clip bridge in both military and sporterized configurations. It is a nice feature that lost favor with scope use. It would be extremely difficult to mill a Ruger. There isn't a lot of material to stabilise the stripper ( which often were very different with each model inspite of the near universal headcase of the 8x57-.30-06 cartridge family) and it would certainly destroy all warranties and resale value. You could buy a clean surplus mauser and sporterize it, or seek an older custom sporter. Either route can easily cost as much , if not more than a off the shelf Ruger. Military chamberings are every bit as efffective, but cost of ammunition can be expensive. The few F.N. and Columbian .30-06 service rifles are very expensive. The 7x57 mauser can be found with an excellent supply of ammunition. I've owned both. A timney trigger and Lyman reciever peep site made for extremely accurate and robust field rifles.