Uboofer

Thanks. That’s what I thought but wanted to confirm it. My frame is marked 257 and has the cutouts.

Ok so I just picked up a S2 last week. Just so I know what to look for, you talking about the cutouts where the trigger spring is?

I would also ground your press. Helps with static electricity

Winchester doesn't have small primers

Never understood the "how fast can you load" thing. I take my time and make sure I make accurate ammunition. No double charges, primer in every case, bullets seated to proper depth.... IMO it's not a race. Been loading for years and been enjoying every moment of it. 550b no case feeder or bullet feeder

2 questions. First, Have you tried flipping the round so that the rim goes in first. Does it fit? Obviously it will not go in all the way down but it will tell you for sure if the rim is the issue or some other issue that you are not detecting. Secondly, have you tried your rounds in a different case gauge? Maybe you have a bad case gauge? Try a different vender. Case gauges are typically SAAMI spec and are designed to fit a minimally sizes chamber. on the lube topic, I feel that lube is always a good recommendation when loading. sparingly of course.