09-18-2022, 07:23 PM
Do to difficulty in obtaining 6 ARC brass I managed to get some Lupua 6.5 new Grendel brass. Formed in 6 ARC Small base dies and trimmed to spec. no issues. Fired the rounds with 28 gr CFE 223 over a cci match primer and Hornady 108 ELD match. Same load I have been using with the Hornady cases I have. Groups run 3/4 inch to 1 1/4 for 5 shot groups. This fired with an AR and a 22 inch barrel.
Now the issue on a few of the Lupua brass cases. After 1 or 2 firings I find the case will not go in my case checker. Close inspection reveals a ridge has formed at the base of the cartridge case . Never seen this before and am unsure why. It only occurs with the lupua brass. It has only happened to 3 out of the 100 Lupua cases I am using. Any suggestions?
Now the issue on a few of the Lupua brass cases. After 1 or 2 firings I find the case will not go in my case checker. Close inspection reveals a ridge has formed at the base of the cartridge case . Never seen this before and am unsure why. It only occurs with the lupua brass. It has only happened to 3 out of the 100 Lupua cases I am using. Any suggestions?