This a 25 creed barrel, with about 600 rounds down it. Used for NRL hunter matches. Kinda crap images but appears to be a crack. Starting at end of case mouth going roughly 1/4” into the rifling. Any idea what could cause it? 
- Thread starter Jakeweb09
- Start date
Yeah pics are a bit rough. The first and last photos are at end of case mouth, center pic is into the rifling. But it’s all the same crack, maybe 1/2” long. Firecracking is smaller cracks all over instead of one large crack like this.
That's...... Something. Contact the barrel maker with images. They deserve to have a opinion.
It's the borescope. The more you use it, the worse it'll get.
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I’ll be sending those photos to manufacture for sure, shot great for first 400ish rounds. Last 200 have been marginal. Not terrible but not like it was. And that definitely wasn’t there before! I could really care less about any firecracking but I use the scope occasionally to see how a barrel is cleaning up. Just never seen anything quite like that! Im shooting this barrel in the mdt hunter match next weekend so im just hoping it holds up for that.
Of course, I'm teasing.
Best of luck in your upcoming match and I hope everything works out to your satisfaction.
