rifled barrel 12ga - does this look right

[Ned Gerblansky]

first time poster looking for voice of experience. i bought a savage 210f last year and as a complete newb - since it was new I didn't check it over.
The receiver was badly pitted and was not manufactured to spec, so the bolt would turn inside the receiver as a shell was being loaded.
I called savage and they had me send it in - re-manufactured it to probably better than new condition. Now, after bringing the gun out of spring/summer retirement I've noticed this - I don't recall seeing this before. I have photographs from last year but they aren't comparable since they were shot with two different lenses, this having significantly more depth of field than the former.

http://picasaweb.google.com/lh/photo/9iCwOxB5aCgH2acJIEfBpA?feat=directlink

What do you think - is the pitting normal? I imagined it would be polished smooth.
At the range, accuracy doesn't suffer - shoots 3" groups even with a terrible flinch.

(can't seem to post photo's... I'll work on it)

ned

 

[mnrivrat]

Well - its not pitting . It does appear a bit rough, but since factory barrels are not polished and this gun shoots OK you have nothing to worry about.

There are those who would lap the barrels bore to help polish it up - either by hand, or by fire lapping. Normal firing will help polish it over a longer period of time.

 

[clem]

Look's like "tool marks" to me.

Enjoy!

 

[rcmodel]

It's not tool marks, because the grooves run across the bottom of the rifling grooves at right angles.

Cut rifling would have tool marks, if any, running in the same direction the rifling cutter was pulled through the barrel.

I would suspect a badly leaded or plastic wad fouled bore that a real good cleaning with a tornado bore brush & solvent would take care of.

Or wrap some 0000 (Extra Fine) steel wool around a bore brush and have a go at it.

rc

 

[clem]

"It's not tool marks, because the grooves run across the bottom of the rifling grooves at right angles.

Cut rifling would have tool marks, if any, running in the same direction the rifling cutter was pulled through the barrel."

Are you sure about that?

 

[rcmodel]

Yes, I am pretty sure.
You can't cut grooves with the cutter running sideways to the direction of the grooves.

I suppose it could be chatter marks, but if so, that has to be the very worst barrel anyone ever made.

rc

 

[clem]

Here is one example of a tool mark.



And another.

 

[Mr. T]

This may sound like a silly question, but are you firing foster slugs out of a rifled barrel, instead of sabot slugs?