Ugliest bore pics

[Lexthedestroyer]

Please explain.....

...DIY colonoscopy? I'm assuming this is where you're headed?

 

[bush1]

...DIY colonoscopy? I'm assuming this is where you're headed?

Yes, just had one recently and was kind of wondering where that scope was before being used on me.
Kinda hoping it wasn't in a Savage recently

 

[f55]

Marlin 1895 ballard rifling, 2014.

 

[Lexthedestroyer]

Yes, just had one recently and was kind of wondering where that scope was before being used on me.
Kinda hoping it wasn't in a Savage recently

Or a "Browning", lol. I know. I'm a child.

 

[GMC403]

Keep in mind Marlin bores are still broach rifled, no hand lapping here!......Pretty normal actually for a Marlin.

Funny thing as OP stated....it still will shoot well.

I like to think of it as "Internal Barrel Fluting"

 

[hometownhero]

Who's got (or had) the ugliest bore?

Here's my entry, Marlin 30-30. Can't get anymore of the copper out (maybe some bore butter?).
500+ rounds, she shoots great and holds 2 MOA out to 200y

My savage axis 223 looked like this. Shot damn good though. And wasn't a lick of copper in it.

 

[Arctic]

So that's what Marlin referred to as "MIcro Groove"!

 

[Ardent]

Good point, the grooves it turns out are radial.

 

[Lexthedestroyer]

So that's what Marlin referred to as "MIcro Groove"!

Lol. Yeah, the twist rate is 1:10 AND 1:0.125...

 

[kamlooky]

Less friction this way?

 

[GMC403]

Lol. Yeah, the twist rate is 1:10 AND 1:0.125...

Pshhhh....., aren't you familiar with "compound twist rates"?. Get with the times!, lol

 

[fingers284]

Who's got (or had) the ugliest bore?

Here's my entry, Marlin 30-30. Can't get anymore of the copper out (maybe some bore butter?).
500+ rounds, she shoots great and holds 2 MOA out to 200y

I can see how the radial machine marks were made on the lands/internal bore by a rotating reamer, but what's really got me puzzled is how did the same marks get engraved in the bore grooves as well. All grooves are cut or swaged by a longitudinal moving tool not a rotating tool as the markings in this photo suggest.

 

[GMC403]

I can see how the radial machine marks were made on the lands/internal bore by a rotating reamer, but what's really got me puzzled is how did the same marks get engraved in the bore grooves as well. All grooves are cut or swaged by a longitudinal moving tool not a rotating tool as the markings in this photo suggest.

Longitudinally moving 1/64" at a time though a very tight bore with no oil might do it. The marks aren't actually spiral, just evenly spaced out chatter rings.

Maybe if you count em they'll tell you how old the barrel is........