Sig ammo problems?

[GLG20]

Bought two boxes of Sig Match Elite ammo. Neither box will allow my bolt to close. Wondering if anyone else had this issue.

Of course I verified headspace with go/no go gauges when I assembled the rifle, and I've run 6 other brands of ammo through it so far with no problems at all.

 

[Hobo Hilton]

I'm sure you will get a variety of suggestions.
Seems if 6 other brands ran OK then I would start out by giving any carbon build up areas a good cleaning.

 

[GLG20]

I'm sure you will get a variety of suggestions.
Seems if 6 other brands ran OK then I would start out by giving any carbon build up areas a good cleaning.

Good suggestion. The rifle was cleaned prior to shooting, and I fired 30 rounds across three other brands after trying to fire the Sig ammo. Didn't check dimensions on the ammo yet.