Oh man I can understand your frustration. That would have me torqued. I would normally think dies with that type of issue but it's on the fired cases and not just one but consistent. If it was the brass you would see it before firing. I understand what your describing in the case neck. I did not do a good job on my end describing it. Let's see what happens with sizing once you put it in the rock chucker as that will eliminate anything screwy there. One thing, if you still have virgin brass start with it inntge rock chucker so we are not seeing rements from already buggered cases.
By chance, did you neck turn the cases after you opened the neck up from .30 to .338?
I can not see how you using too much lube during sizing is causing this as its showing after firing not sizing. I assume you are cleaning the cases after sizing so dry chamber and case, no lube in chamber.
I hope going to the rock chucker is going to clear up the 0.006 needed shoulder set back as that just should not be happening.
Hey if there is still an issue after trying the RC press I could send you my die for a week or so to try to rule out something weird with the die.
Just be sure to try at least one virgin case to see once you change over.
I want to think on this for a bit. I will post back. Issues like this get under my skin to figure out.
By chance, did you neck turn the cases after you opened the neck up from .30 to .338?
I can not see how you using too much lube during sizing is causing this as its showing after firing not sizing. I assume you are cleaning the cases after sizing so dry chamber and case, no lube in chamber.
I hope going to the rock chucker is going to clear up the 0.006 needed shoulder set back as that just should not be happening.
Hey if there is still an issue after trying the RC press I could send you my die for a week or so to try to rule out something weird with the die.
Just be sure to try at least one virgin case to see once you change over.
I want to think on this for a bit. I will post back. Issues like this get under my skin to figure out.