northernlightsglass
Member
- Joined
- Jul 14, 2014
- Messages
- 9
I hope this isn't redundant, but I was shooting some '91 L.C. SS109 new ammo out of my Colt 223 upper and had roughly 10% of the cases splitting at the neck. Other headstamps had a number of splits as well (from a variety of suppliers, mostly reloads).
Can understand splits here on xth reload (work hardening of the neck) but was surprised to see so many on new cases. Never noticed this before.
Could there be something amiss with my chamber?
Also, noticed (under 60x tooling microscope) that my firing pin no longer came to a point, but ended with a dimple, as though another firing pin had hit it. I changed it out, but wondered if this could relate to the above.
Not much in the way of pressure signs, maybe one or two pierced primers (it was hard to tell) and primers somewhat flattened, but on a par with what I've seen with all my 223.
Anyone run into this before?
Thanks in advance.
Can understand splits here on xth reload (work hardening of the neck) but was surprised to see so many on new cases. Never noticed this before.
Could there be something amiss with my chamber?
Also, noticed (under 60x tooling microscope) that my firing pin no longer came to a point, but ended with a dimple, as though another firing pin had hit it. I changed it out, but wondered if this could relate to the above.
Not much in the way of pressure signs, maybe one or two pierced primers (it was hard to tell) and primers somewhat flattened, but on a par with what I've seen with all my 223.
Anyone run into this before?
Thanks in advance.