With my BLR the reloading/resizing issue was not case diameter, but rather shoulder (head spacing) length. The guys at RCBS said send it along with some brass, but rather than waste my time with that process I decided to just grind a couple of thousands off the shell holder and 'voila' no more chambering issues. My BLR chamber is so close to 'no go' spec that the RCBS wasn't quite pushing the shoulder back far enough. It should have. Small base dies would not have helped in this scenario obviously. I am slowly converting all my RCBS dies to better ones. I will never buy an RCBS die again as every time there has been any kind of sizing issue with any of my brass/calibers it has always been with their product. What do I like? Any other brand.