RE: Bolt v. Semi
The only issue and I mean only is that their triggers arent adjustable, so if trigger pull matters to you, then youll have to take it to a gunsmith and for about 50bucks(my area) you can get that 3ish # trigger pull most people like.
Other then that the Rugers are great. Their 3 position safety is awesome, they have stainless bolts even on the blued models which is smart, they are accurate and come with the intergral scope rings as part of the purchase price. I have a few Rugers and other then my Brownings they are my fav guns. You'll be very happy with a Mark II.