Case trim tolerance?

Reloading info for the 5.7x28mm

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Case trim tolerance?

Post by Bazzer69 » 25 Apr 2015, 15:33

I've just purchased the WBT from Little Crow, but I find the cases are varying in length after using it. The cases have been put through my sizing die and have been cleaned in my Ultasonic cleaner. I'm guessing the reason for the difference is because the WBT trims from the shoulder and there must be differences in the length from the base to the shoulder. My brass was bought in bulk. So what is the allowable tolerance? I am aiming for a case length of 1.135 max, so what is the minimum ? All the cases, were checked on a EA case gauge before trimming and were fine.

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