Gas Checks for 30 Carbine?

[supersonic]

Last week, I loaded up about 50 123 grain cast pills someone gave me for my M1 Carbine, and I had about 15 fail to fire w/ heavy primer strikes. Now, I am wondering if somehow the powder/primers got contaminated or if there is something wrong with my firing pin/spring. Additionally, these bullets were neither lubed, nor did they have gas checks on them. I was running a pretty stout load of H-110 (about 12 grains, approx. 1700 fps.), and I was using CCI #41's. Any input?

[sirgknight]

First of all, most of the load data that I use calls for a starting load of 11.7 grains, so I wouldn't think that 12 grains of H110 would be a stout load. If your firing pin made heavy strike marks then you either have bad primers, or the firing pin didn't strike "hard enough" to ignite the primer. Sometimes it takes a pretty hefty firing pin to ignite Magnum military primers.

[supersonic]

Thanks for the info. And all along I thought I had a "stout" load!:oops:

[John Traveler]

The .30 M1 Carbine cartridge headspaces on the case mouth.

Case length for this cartridge is critical: too long and you will failure to chamber and lock. Too short and you will have failures to fire or gas blowback in your face.

[shotman]

CCI 41 thats an old primer would try some new ones

[scb]

CCI 41 thats an old primer would try some new ones

Current production.

http://www.cci-ammunition.com/products/primers/primers.aspx?id=30