What is wrong with my barrel?

[BallisticsGuy]

Local smith or Micky G's. I know McGowans work only from accessories but those accessories were pretty spanky. I'd happily go that way.

 

[Bullitthead]

Yes, I'm satisfied it's not the load... Bullet, powder, primer, etc. May try Tubbs. Have used them in a different gun before but couldn't tell that it made any difference. Have you had good luck with them?

I have used Tubbs on two guns. One a weatherby vanguard 6.5 Creedmoor went from 1.5 moa to .75 moa the other not so much. If there is anything there it might help you get it. The word crapshoot comes to mind.

 

[kfreeze]

Hey,
I've got a 270 Xbolt that used to be an incredible shooter... shot multiple 5 shot groups in the .4s. However, the group sizes have since opened up over 1" and I've been scratching my head trying to figure out why. I did all the normal stuff, checking scope, rings, action screws, brass, even trying to re-work the load. I recently bought a bore scope so I could take a look at the barrel of this gun and my other rifles. I compared the barrel of my 270 to several other guns and found some things in this barrel that I didn't find in any other gun. I'll post pics below.
Pic 1 looks to be some kind of fouling, but I don't know. I've used multiple different types of cleaners (foams, Butch's, Boretech Cu2, etc) with both patches and bronze brush. This evening I switched to Losso and the patches are coming out black, black.
Pic 2 seems to show some kind of scarring/pitting???
Pic 3 this is toward the very end of the barrel (muzzle). I have no idea what this is.
Can anyone help me interpret these photos and advise me on steps I should take moving forward? Thank you in advance.

Your rifle probably just broke in and pushed you out of a small node that it liked. That is not at all uncommon for a factory barrel. Look for a wide node and change the powder. What bullets are you shooting?

 

[bryanfields]

Your rifle probably just broke in and pushed you out of a small node that it liked. That is not at all uncommon for a factory barrel. Look for a wide node and change the powder. What bullets are you shooting?

I was shooting Berger 130 Classic Hunters with H4831. In my original load work up it shot 4 different powder charges very well. I've since tried two different powders and still no luck. I'll look for the original target and see if I can post it.

 

[bryanfields]

Original load work up.

 

[RidgeTop]

I am using J-B and doing good. going to try Semichrome for the first time - just for grins.
Try to get better pictures.
I i will attach some pics of my barrels. Rem 742, Ranch Rifle 7.62x39
Pics are almost clean, muzzle from inside, lug, lands at neck, lock lugs, gas port
jim

 

[kfreeze]

Original load work up.

Looks like the rifle did well then. Maybe change the load details. Maybe heavier bullets and different powders?

 

[bryanfields]

Looks like the rifle did well then. Maybe change the load details. Maybe heavier bullets and different powders?

I've since switched to 140 classic hunters. Again, I've tested every detail you can imagine from the loading perspective.

 

[kfreeze]

I've since switched to 140 classic hunters. Again, I've tested every detail you can imagine from the loading perspective.

Don't know what to say without having it at my place to play with. Maybe try to shoot in on a day you are shooting another rifle under 1/2 moa?

 

[bryanfields]

Don't know what to say without having it at my place to play with. Maybe try to shoot in on a day you are shooting another rifle under 1/2 moa?

Good idea. I plan to take shoot it again next time I get a chance and I'll babe a couple other guns with me. If it doesn't shoot after cleaning it with Iosso I'll probably give up and rebarrel.

 

[kfreeze]

Good idea. I plan to take shoot it again next time I get a chance and I'll babe a couple other guns with me. If it doesn't shoot after cleaning it with Iosso I'll probably give up and rebarrel.

Probably not the best idea to give up on a barrel. It shot good before. I am a consistant 1/2 moa shooter. I can't expect my rifles to be 1/4 moa rifles.

 

[bryanfields]

Probably not the best idea to give up on a barrel. It shot good before. I am a consistant 1/2 moa shooter. I can't expect my rifles to be 1/4 moa rifles.

I hear ya. I'd be fine if it was consistently 3/4", but it's often been over 1".

 

[kfreeze]

I hear ya. I'd be fine if it was consistently 3/4", but it's often been over 1".

How do you know that you are a better shooter than moa? Not a jerk remark by the way. Just in all seriousness?

 

[bryanfields]

How do you know that you are a better shooter than moa? Not a jerk remark by the way. Just in all seriousness?

Did you see the pics I posted above?