I've always had the 2 piece Weaver base set on my rifles and have never once has an issue with this set up. The nice thing about the one piece Leupold type base is that you get extra windage adjustment built into the base. I've only ever had one scope that needed extra windage adjustment. I swapped scopes om my sporterized Mauser, and the Weaver 3x to 9x I put on there ran out of windage adjustment. This was a Weaver 2 piece base set also, and I had to go buy a set of windage adjustable rings. Just a thought to keep in mind when you make your purchase.
