Trouble cleaning one groove.

[Snooterpup]

Looking for opinions on this situation.
I must have run over 100 patches down this .54 bore, first with tepid water, soap and a flush tube, then with Birchwood Caseys #77 black powder solvent, bronze brushing, Ballistol, and even PB Blaster. Have a look at the cleaning patches. There is one groove that will not clean. I have been shooting black powder over 50 years and haven’t seen this before. I’m thinking one groove might have been cut a bit deeper. It is a Green Mountain barrel in a rifle just a bit over one year old. Barrel appears absolutely spotlessly clean with a bore light.
Any ideas?
Thanks to all, Snoot
PS Pardon the leftover crud on the nose cap. It was cleaned after the photo!

 

[64Springer]

That bore is clean clean clean.

Oil it and be done with it.

I'm thinking that infinitesimally small speck of gray residue is graphite.

 

[Old-Duckman]

Being a perfectionist sux, doesn't it? I am in many ways but perfectly clean patches are not one of my issues. I agree with 64 Springer...the bore is clean, lose no more sleep, it ain't worth it!

 

[tenngun]

Doubt it twere that clean when it were new.
Looks like something I wouldn’t care about. I can’t think of a time I didn’t get some mark on a patch

 

[LME]

Looking for opinions on this situation.
I must have run over 100 patches down this .54 bore, first with tepid water, soap and a flush tube, then with Birchwood Caseys #77 black powder solvent, bronze brushing, Ballistol, and even PB Blaster. Have a look at the cleaning patches. There is one groove that will not clean. I have been shooting black powder over 50 years and haven’t seen this problem. I’m thinking one groove might have been cut deeper. It is a Green Mountain barrel in a rifle just a bit over one year old.Barrel appears absolutely spotlessly clean with a bore light.
Any ideas?
Thanks to all, Snoot
PS Pardon the leftover crud on the nose cap. It was cleaned after the photo!

All that rifle needs now is shooting!

 

[64Springer]

Everyone agrees the bore is clean.

Frees up the OP to inspect the silverware coming out of the dishwasher.

Is there a water spot on that glass?

 

[Snooterpup]

Everyone agrees the bore is clean.

Frees up the OP to inspect the silverware coming out of the dishwasher.

Is there a water spot on that glass?

Ooooh, I’ve been properly chastised. I do take meticulous care of my firearms and yes, the bore looks perfectly clean.
Just wondered why one groove still has a noticeably black ‘bacon strip’ when all else is great. Gun shoots great, no problems whatsoever. Just pondering the mystery.

 

[Snooterpup]

Doubt it twere that clean when it were new.
Looks like something I wouldn’t care about. I can’t think of a time I didn’t get some mark on a patch

Thanks Tenngun!

 

[Snooterpup]

Being a perfectionist sux, doesn't it? I am in many ways but perfectly clean patches are not one of my issues. I agree with 64 Springer...the bore is clean, lose no more sleep, it ain't worth it!

Indeed, but we try our best in spite of Joe’s imperfect world.

 

[LANEY REECE]

Give it to me, it does not look clean. Ha ha! Bud you will never get white clean patches. You are doing a good job.

 

[deerstalkert]

flat breeched or chambered breech?
if chambered you may be picking up some fumunda and dragging it down one groove.
flat faced chambered, you may be picking up said fumunda from the vent if a flinter.
i wouldn't get in a twist about it, after all some of us don't clean for days sometimes if we are shooting daily.