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Accuracy issue due to burr at gas port?

beenawhile1

Private
Full Member
Minuteman
Feb 26, 2013
149
114
I need some opinions from you guys. I can't get this barrel to group at all, everything is about 1.5 inch. I tried handloads, Federal GMM, took the muzzle device off and nothing seemed to change. Then I bore scoped it and found what appears to be a large burr at the gas port. Barrel has 280 rounds through it. What does the Snipershide braintrust think?
 

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I have an email out to the company. I figured any remnants from drilling the gas port would be gone by now, but it just looks like it's damaging the jacket. I've gone through a couple of WOA barrels and they have always shot good, but I wanted to give this one(Noveske) a couple hundred rounds first.
 
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Geez, that looks like and old Marlin 444 microgroove. I can't really tell where the lands are but if that port is going through a land it's not going to help accuracy.
 
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Geez, that looks like and old Marlin 444 microgroove. I can't really tell where the lands are but if that port is going through a land it's not going to help accuracy.
Ya, I couldn't get it to focus too good. I did shoot my old JM microgroove .357 lever gun today
 
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Noveske's 416R SS composition is super hard. With a new Noveske SS barrel, little chunks breaking off at the forward edge of the gas block are not at all uncommon. When that happens, accuracy falls off.

It will smooth out with another 100 rounds and the barrel will shoot fine.
 
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Noveske's 416R SS composition is super hard. With a new Noveske SS barrel, little chunks breaking off at the forward edge of the gas block are not at all uncommon. When that happens, accuracy falls off.

It will smooth out with another 100 rounds and the barrel will shoot fine.
Reached out to them and got a response, sent a follow-up question and now waiting to hear back. I imagine with the holiday it will be next week sometime. I ran some bore tech though it this morning and got a better picture.
 

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