kmw1954
Member
Press flex, seater stem fit and even overall press tightness, meaning slop, Will be there no matter what and which brass being inserted isn't going to make a difference because that is all inherent in the process. Agree that tightness between the brass and the die due to wall thickness while sizing or irregular primer pockets can effect Flex or distortion. Also agree the only real effect different case lengths is going to have is in the crimping process.
The basic consistency of the bullet nose shape or bullet over-all length in relation to the seating stem is going to be the biggest contributor to inconsistent over-all length. If the seating stem is locating off the tip of the bullet and the shell holder returns to the very top of the stroke it should reproduce the same dimension every time. But as we all know the bullet seating stem does not orientate off the tip if the bullet in most cases.
The basic consistency of the bullet nose shape or bullet over-all length in relation to the seating stem is going to be the biggest contributor to inconsistent over-all length. If the seating stem is locating off the tip of the bullet and the shell holder returns to the very top of the stroke it should reproduce the same dimension every time. But as we all know the bullet seating stem does not orientate off the tip if the bullet in most cases.