Input on damaged rifling

[millerkiller77]

I've got a Ruger American gen2 in .223 that shoots every load under 1.5'' and it's favorite load of 73ELDM/H322 consistently shoots 1 hole groups, the best 4 shots measured .18".
The last few years, I've been fascinated with borescoping rifles mainly to see how effective different cleaning products actually are and the relationship of fouling on accuracy. This particular Ruger barrel has chunks missing from the lands and in two sections the chunks are impregnated into the grooves. It looks like tooling gouged the land and smeared the still attached chip into the groove. I've always been under the impression that Ruger barrels were hammer forged, so how is this even possible? If one of those chips came loose and out the barrel @3000fps I'm pretty sure it would ruin the barrel and whatever muzzle device was on it at the time, so I sent the rifle back to Ruger. Anyone on here with knowledge on how barrels are made have any theories?
I ruined my borescope lens so the pics aren't the clearest, but hopefully these will give you an idea of what I'm trying to describe.

 

[Potsie]

It shoots that well with the chunks missing?

 

[millerkiller77]

It shoots that well with the chunks missing?

The worst I could get was 1.5" with RMR 69gr jhp. Vmax, Fusions, ELDM, TBBC, SMK's, all had multiple nodes that grouped under 1". Besides the the chunks missing, it's one rough, ugly bore. Absolutely amazing how good it shoots. This two pics are the same barrel.

 

[morgaj1]

What did Ruger say?

 

[BAKPAKR]

The worst I could get was 1.5" with RMR 69gr jhp. Vmax, Fusions, ELDM, TBBC, SMK's, all had multiple nodes that grouped under 1". Besides the the chunks missing, it's one rough, ugly bore. Absolutely amazing how good it shoots. This two pics are the same barrel. View attachment 362334View attachment 362335

It looks like they tried threading the inside of the barrel.

 

[Mallardsx2]

That looks like a deep tear that happened while gun drilling the bore.

 

[Fire_9]

What difference does it make if it shoots as well as you say it does? Borescopes have got to be the biggest pain in the ass for barrel and rifle makers

 

[winmag]

That’s crazy that it shoots that well with that large of a flaw. Stuff like that would bother me too, but I’d try to convince myself to leave alone and just shoot it.

What’s the plan when it comes back with a new barrel without visible flaws but shoots 1.5” at best instead of 1.5” at worst?

 

[mevertsen]

If it shoots, it shoots. Leave it be.

Many things in life are imperfect and work just fine.

You may see the imperfections.

But it may well be within spec.

It's a mass produced rifle.

 

[Richard22]

People who throw stones at bore scopes remind me of people who never look under the hood to check the fluids or underneath their vehicle to check for leaks. While it's not something you do every day or even every week, it offers peach of mind that things are working and holding up as they should.