Light strikes or bad primers?

[Hunter609]

Went to fire form for my new 338 lapua improved today and had 1 round out of 10 loads I tried fire. I’m using a new brick of cci 250s I’ve had for 5+ years. The one round that did go off was on the second try. Also had the bullets jammed .020 so the case wouldn’t move. It almost looks like light strikes. I had 2 factory loads that did fire no issue. Any thoughts?

 

[Wrench]

Those are light strikes. Is your chamber shy of the parent case headspace? You could be long chambered. You can tell by measuring your fired case against a unfired case at the shoulder. Running a long bullet doesn't ensure the case stays put.....you still have to jump the extractor and the ejector.

If you are long, I would size the mouth up a bit and feed them red dot without a bullet to form.

If they're not long, you could be hanging the sear, crap in the bolt body.....etc.

 

[fatbacks]

I just had this happen with a defiance anTi. Firing pin was out of spec. They sent me a new one.


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