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Strange seating problem with nny brass

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Strange seating problem with nny brass

Postby MJ1 » Wed Nov 01, 2017 6:26 pm

I have a guest coming to shoot my Pu's this weekend. I prepped 50 nny cases FL sizing and primed. As I put in the 174g SMK's and down stroke the SMK enters about 8mm then crushes the neck down onto the shoulder. I have reloaded this brass one other time with out a problem but I just crushed six cases. Rechecked everything same dies and components. Giving up for tonight. I will bust some pictures when I cool off. :roll:
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Re: Strange seating problem with nny brass

Postby MJ1 » Wed Nov 01, 2017 7:00 pm

It's like the neck is to tight but i have loaded these cases once before. I have measured the mandrel and it's still a .002" fit.

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Re: Strange seating problem with nny brass

Postby Grimstod » Thu Nov 02, 2017 5:05 pm

Or turn your seating die out one 1/4 turn. You are over crimping them. This happened to me too in the beginning. The instructions for seating dies are :crazy:
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Re: Strange seating problem with nny brass

Postby Marauder 1 » Thu Jan 25, 2018 12:59 am

+1 for what Grim said, I've also had a build up case lube do something similar I crushed several pieces of brass then I cleaned the die and no more issue.

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