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Borescopes, tooling marks and proof on the target.....

Wiley

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All across various shooting sites there are discussions surrounding 'bad' looking borescope pics. A lot of the time these pics literally suck the confidence right out of the shooter. Sometimes it's best to ignore what we perceive as a bore that just must be way out of spec and let the weapon AND our individual confidence be the authority on what the reality actually is. Case in point here..... one of my latest 541T Sporters that shoots lights out with SK Standard Plus at 50 yards. This rifle has 2 action screws vs some that only have 1. The other day I posted pics of targets from a little range session with this rifle and my other 541T Sporter that only has one action screw. Today I'me reposting pics of the target that I shot with the 2 screw rifle and a couple of borescope pics of that rifle.

Pics from Sunday......
541 T Slick target.webp

541 T Slick penny.webp

Borescope pics today....these tooling marks are about an inch in front of the chamber and are on each of the lands 360 degrees at this location. They look pretty horrible but the target pics tell a different story. The rest of the bore looks normal as does the entire bore on the other rifle. This just goes to show that what we see with a borescope that looks like severe defects in the bore needs to be target verified. Allowing the pics to impede on one's confidence can be a lot worse than the perceived 'defects' in the steel.
Photo on 1-17-25 at 10.43 AM.webp

Photo on 1-17-25 at 10.42 AM.webp
 
Yep. I use a borescope to check to see if I need to do more cleaning to remove a carbon ring, but the rifle itself tells me if it has potential, or not, and that's after shooting it extensively with different brands of ammo.
This morning the borescope unraveled the mystery of my MTR shooting terribly on Sunday. Granted, the only distance that I shot was 100 yards and there was a slight left to right breeze. This morning the bore was spotless. Apparently the 35 or so shots that I fired didn't season the bore and I'm really taken aback by that. I shot a few sighters and then the 25 bulls. This morning, a clean patch after the borescope came out barely showing any junk on it. All that I ran through it was the SK S+ that it normally really likes. More testing to come, possibly this afternoon.
 
I use my bore scope to be sure my carbon ring is gone.


I don't care how rough a bore is as long as it shoots good. I've seen people buy a new rifle, bore scope it and send it back because it looks bad. Crazy
 
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