Originally Posted by
amc577
The chap with the unuseable 100 rounds had crimped them....h and n plated lead bullets....further use of the seating die no use...repeat...ALWAYS make up a dummy round and check it will chamber, before you load up a lot of ammo. You should not normally crimp the h and n plated bullets....something else to remember..
amc577
Exactly, the crimp has caused the neck and/or shoulders to swell to the point where the cartridge would not chamber.
That has nothing to do with the cartridge overall length.
You can crimp H&N plated bullets, and all other lead cored bullets with or without a crimp groove, with the Lee factory crimp die which works differently to the roll crimp in some seater dies but can still cause bulged shoulders if badly adjusted.
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