JB bore paste diagnoses

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BFD
Posts: 2087
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Re: JB bore paste diagnoses

Post by BFD » Thu Aug 30, 2018 6:53 pm

Yes.

I don't know why now and never before in decades of shooting. All I can think of is it is that particular lot (210.113) of powder has an issue. Seems improbable, but I have no other hypothesis to test. Just loaded from a different lot.

MAH
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Location: Fla

Re: JB bore paste diagnoses

Post by MAH » Thu Aug 30, 2018 7:10 pm

The problem you discussing is basically the same problem that I am going thru. Hopefully I have traced mine back to my lube. Not 100% thru this nightmare yet. The next couple of matches will tell for sure.


MAH

BFD
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Re: JB bore paste diagnoses

Post by BFD » Thu Aug 30, 2018 7:12 pm

MAH. It is a nightmare. But I have exactly ZERO lube in all three of these guns. None what so ever. What is your powder lot?

Dan O
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Location: Great Falls Montana

Re: JB bore paste diagnoses

Post by Dan O » Thu Aug 30, 2018 8:13 pm

Brent do you have a different lot of powder to test with?

Dan

BFD
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Re: JB bore paste diagnoses

Post by BFD » Thu Aug 30, 2018 8:17 pm

Yes, that's what I am loading now. Will try it in Lodi in 10ish days.

BFD
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Re: JB bore paste diagnoses

Post by BFD » Thu Aug 30, 2018 8:17 pm

Yes, that's what I am loading now. Will try it in Lodi in 10ish days.

beltfed
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Re: JB bore paste diagnoses

Post by beltfed » Thu Aug 30, 2018 8:35 pm

Brent,
I hope you have ALL the "whatever" is in those barrels totally cleaned out before
you try the other lot of powder.
Arnie

BFD
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Re: JB bore paste diagnoses

Post by BFD » Thu Aug 30, 2018 8:38 pm

I hope so too. I think I do.

mdeland
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Re: JB bore paste diagnoses

Post by mdeland » Thu Aug 30, 2018 10:16 pm

Can it possibly be the paper batch?

MAH
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Location: Fla

Re: JB bore paste diagnoses

Post by MAH » Fri Aug 31, 2018 5:48 am

The conditions I was encountering were very similar to yours. Except I had long threads that appeared to look like plastic. The rifles would shoot great then just go into another time and dimension. My powder is Swiss 1 1/2 lot number 21/07/2014. Too correct the problem, I reduced the powder charge by 4.5 grains and went to a different lube. Lost 30 fps on a 400 gr. money bullet in a 40-65. Jury is still out. I will know better after this next match.


MAH

Gussy
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Re: JB bore paste diagnoses

Post by Gussy » Fri Aug 31, 2018 9:36 am

How much of this color is the original forming oil from the manufacturer? That new barrel had oil in it. Barrel is hot and the pores absorb the oil as it cools.

Gussy
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Re: JB bore paste diagnoses

Post by Gussy » Fri Aug 31, 2018 9:37 am

How much of this color is the original forming oil from the manufacturer? That new barrel had oil in it. Barrel is hot and the pores absorb the oil as it cools.

BFD
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Re: JB bore paste diagnoses

Post by BFD » Fri Aug 31, 2018 9:40 am

THe new barrel had been wiped down with my normal barrel oil, and then, prior to this test, wiped dry of everything. It was as clean as steel can be. And it produced a dark grey, but not black patch.

MAH
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Re: JB bore paste diagnoses

Post by MAH » Fri Aug 31, 2018 6:20 pm

That grey color is steel!! Seen that on numerous occasions while lapping pistons, valves, and all other junk on big yellow junk. You can not get your barrel any cleaner!

MAH

BFD
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Re: JB bore paste diagnoses

Post by BFD » Fri Aug 31, 2018 6:32 pm

Yes, that's what I figure.

Next weekend we will see how it goes.

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