Very nice rifle buckstix. Personally I would replace the bases. I'm not a fan of bases that hang out over the action area for no good reason and the raised metal of the forward edge of the recoil pin recess in the front base (second image) highlights some movement has occurred of a previously mounted scope in what ever rings were used. Much prefer genuine Weaver bases with rings having squared cross pins to match the square slots in Weaver bases, solidly locking both rings against recoil.

The Warne rings you have ordered for the 527CZ just have a rounded side pin as a recoil stop for which you will have to drill a hole in the base/s?