bad barrel?

[johara1]

+1 Bingo. I usually clean well after a two day match, which includes fouling, sighters and maybe some last minute test rounds up to about 200 rounds. Cleaning isn't a five minute job, it takes time and a lot of elbow grease. I may stretch it over a day or three.

Some barrels will shoot dirty to a point, some will not you should know this number. I have had great barrels that 20- 25 shots was it or accuracy fell off... jim

 

[Evan]

Some barrels will shoot dirty to a point, some will not you should know this number. I have had great barrels that 20- 25 shots was it or accuracy fell off... jim

Or in the case of my 7 twist 22BR, the bullets start to go poof! Nothing will replace a good bronze brush.

 

[WIB3]

The barrel is not clean. Send everyone a pic when it is clean.

 

[swadiver]

The barrel is not clean. Send everyone a pic when it is clean.

here you go

 

[johara1]

I see a lot of carbon still in it, I think you need a lot more work.... but you are closer.... jim

 

[WIB3]

Still seeing some carbon, but don’t see anything radically wrong. I would do some more cleanup, I use Flitz on a nylon brush. Works very well for removing carbon. Maybe do some more experimental loading. I’m not saying that this is not a lemon but I don’t see anything based on your pics to say it might be.

 

[WIB3]

I have had barrels that were mediocre to say the least. But at 400-500 rounds they became world class. They are still shooting fantastic at 1200+.

 

[Old Navy]

Some barrels will shoot dirty to a point, some will not you should know this number. I have had great barrels that 20- 25 shots was it or accuracy fell off... jim

Ditto!

 

[Rdlningcltchdmpr]

what's the record for a 5 shot group shot a 100 yards?

.0077"

 

[BenPerfected]

Slug the barrel and see if there are any loose spots.
Ben

 

[Richard Coody]

Use it for a tomato stake

 

[swadiver]

it shot better, more consistent after an aggressive cleaning. i am going to continue to work with it

 

[Martin52]

.......more consistent after an aggressive cleaning.

Sounds good, was the more consistent shooting straight after the pics in your post #64 or did you clean some more after those pics and then shoot ?

How are you getting the carbon out now ?

 

[WIB3]

Flitz on a nylon brush. 10 passes re-applying every pass. Clean up with patches until clean. Finish up with a patch soaked with Marvel’s mystery oil.

 

[Ccrider]

Flitz on a nylon brush. 10 passes re-applying every pass. Clean up with patches until clean. Finish up with a patch soaked with Marvel’s mystery oil.

The Flitz bore cleaner or rubbing compound?

 

[WIB3]

In the past 30 years of benchrest shooting I have had 40+ barrels from many manufacturers. All were top notch. They were all different and required testing and a lot of development on my behalf. But they were all competitive, I’m not saying that everyone was capable of a world record, but for the times, they were capable of running with the best. If you can’t come up with a load that will shoot under an inch at 100yds, might want to cut it in half. Unless you are a professional smith that knows what you are looking at, put the bore scope away and focus on testing with a chronograph.

 

[6MMsteve]

Run a set of Tubb fire-lapping/throat maintenance bullets over it, then scope it again. Or get someone to diamond-lap it.

you mean diamond paste .05 micron

 

[swadiver]

In the past 30 years of benchrest shooting I have had 40+ barrels from many manufacturers. All were top notch. They were all different and required testing and a lot of development on my behalf. But they were all competitive, I’m not saying that everyone was capable of a world record, but for the times, they were capable of running with the best. If you can’t come up with a load that will shoot under an inch at 100yds, might want to cut it in half. Unless you are a professional smith that knows what you are looking at, put the bore scope away and focus on testing with a chronograph.

under an inch at 100 yds? with a 12 twist custom 6BR barrel? that is not the accuracy standard i apply. of course it shoots under an inch at 100 yds. it's not a hunting rifle barrel.

 

[Dusty Stevens]

under an inch at 100 yds? with a 12 twist custom 6BR barrel? that is not the accuracy standard i apply. of course it shoots under an inch at 100 yds. it's not a hunting rifle barrel.

If i ever did a hunting rifle barrel that didnt shoot a long way under 1” at 100 i would replace it- and im even talking about #1 mountain rifles

 

[jim_k]

you mean diamond paste .05 micron

I use Barney Eiseman at Shooters Station in Conroe, TX. I think he uses a 2-4 micron paste. So it sounds like your plan will work. The particulars of the lapping are the next step.