carbon build up in 30 BR barrel

[zippy06]

I don’t see any scratches in my barrels, so l cant go along with you. A 10 power maginifier is clear enough to not see any damage at the crown. And you have to realize the brush isn’t touching the bore either, so what’s the problem? If You want to over analyze things be my guest. I had a bore that was badly pitted and shot the same as a pristine barrel.

get your barrels one of these. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Keep in mind it is 20X.

They even have one for pistols. https://www.amazon.com/Borescope-Cle...ef_=ast_sto_dp
Plug into computer with Win 10. Win 10 has a camera program.
I used to use a flashlight in my pistol barrels. Was bored one winter. Used the Hawkeye on a pistol. WOW! I was not getting them clean.
So I now use the Teslong borescopes after cleaning on everything...

[rsmithsr]

they do not compare.
more time of flight
more time in the wind....wind maybe 30 plus feet above line of sight
having said that
bart has a 5 shot 600 yard record of about .3
and i think there is a 1. at 1k that is probably 5 but maybe a 10.

In a new barrel with something they can see inside it with, like a bore scope, they will see straight scratch marks the lapping compound made. My memory sez they use 150 grit to lap barrels before they sell them. Those scratches don't last forever, however. The best Group Shooter ever to live said the first 600 shots through a barrel are the best ones. Perhaps it has something to do with those straight scratches??? Perhaps one could periodically cast a lap , apply the 150 and put the "New" back in they barrel

Pete

[Pete Wass]

they do not compare.
more time of flight
more time in the wind....wind maybe 30 plus feet above line of sight
having said that
bart has a 5 shot 600 yard record of about .3
and i think there is a 1. at 1k that is probably 5 but maybe a 10.

No question, Is the .3 after reducing it for the distance? Doesn't matter too much cause .3 is tiny @ that range anyway.

Pete

[rsmithsr]

No question, Is the .3 after reducing it for the distance? Doesn't matter too much cause .3 is tiny @ that range anyway.

Pete

no, actual measurment

[1911Nut]

Here it is-

https://bulletin.accurateshooter.com...-at-600-yards/

[rsmithsr]

YES BUT
the scoring committee sent it back as .311...still a record
the 282 is the range measurement.
ohh and a NO TURN NECK

Here it is-

https://bulletin.accurateshooter.com...-at-600-yards/