I ask about the bases because I once sized some .452 X 200g. L-RNF's that were oval in shape, caused from a tiny bit of Pb on the face of the mould.
I believe I measured several at .460"...started to throw them back into the pot and for some reason went ahead and sized directly to .4525" just to see if they would size easily...without a bit of Hornady's 'One Shot' lubricant they pushed harder than usual, but with the lube they sized easily.
What I did notice is that the sizing pushed material from the bottom drive band lower than the base and formed a ragged skirt partially around the circumference. When I sat the cast on it's base it was noticeably crooked from that extended skirt. They went directly back to the pot but I'm quite sure that if I had loaded them they wouldn't have been any part of a group those rounds shot, they would have been out of group but don't know how far...kinda wished I had gone ahead and shot them to see what would happen.
What is it they say about 'hindsight'.?. "It's 20/20"!