Slugging the barrel Questions

Ask Shiloh questions about your Shiloh Sharps Rifle.

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Cholla
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Slugging the barrel Questions

Post by Cholla » Tue Dec 08, 2020 6:52 am

I have an older Shiloh Sharps. I am going to slug the barrel to find the exact size. Sounds simple but I read recently that some long-range barrels are choked down at the muzzle. Has anyone run into this? If that is true I assume I need to slug the barrel a short distance from the breech and then push it back out the breech.

bryany
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Re: Slugging the barrel Questions

Post by bryany » Tue Dec 08, 2020 8:52 am

I slugged mine from both ends. Push it in several inches from the breech and then push it back out the same way. Same trick with the muzzle. I'm not sure I could measure any choke with a hand held micrometer but I agree there is a minuet choke in the barrel.

Take your time, use plenty of oil or other lubricant.

Bryan
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bpcr shooter
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Re: Slugging the barrel Questions

Post by bpcr shooter » Tue Dec 08, 2020 7:04 pm

Cerrosafe is a very good option!! you can then check your chamber as well!!
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Lumpy Grits
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Re: Slugging the barrel Questions

Post by Lumpy Grits » Wed Dec 09, 2020 8:20 pm

Use pure lead for the 'slug'.
Gary
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Tyker
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Re: Slugging the barrel Questions

Post by Tyker » Tue Dec 15, 2020 4:20 pm

Having been gun-smithing for 4 plus decades I'm trying to imagine how a broach or button or whatever would become smaller as it was drawn through a barrel and eventually resalt in a decreased barrel bore...??

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desert deuce
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Re: Slugging the barrel Questions

Post by desert deuce » Sun Jan 31, 2021 9:52 am

Hand lapping from the breech end will do it. My slightly choked at the muzzle barrels shoot quite well.

Usually, I used a pure lead slug about an inch or so long driven all the way through from the breech end to determine groove and bore diameter.

I wrap a thick cloth around the muzzle to catch the slug on exit.

Mostly satisfied curiosity as the rifle doesn't seem to care and as one of my hard holding shooting partners says, the barrel will make the bullet round before it leaves the muzzle.

I worry over bullet fit in fired case and to chamber more than anything else. Case separations are to be avoided.
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John Boy
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Re: Slugging the barrel Questions

Post by John Boy » Sun Jan 31, 2021 3:54 pm

Anyone drop in certified plug gages to measure the lands and an inside micrometer for the groove depths?
Regards
John

John Boy
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Re: Slugging the barrel Questions

Post by John Boy » Sun Jan 31, 2021 3:54 pm

Anyone drop in certified plug gages to measure the lands and an inside micrometer for the groove depths?
Regards
John

kcstott
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Re: Slugging the barrel Questions

Post by kcstott » Sun Jan 31, 2021 11:53 pm

John Boy wrote:
Sun Jan 31, 2021 3:54 pm
Anyone drop in certified plug gages to measure the lands and an inside micrometer for the groove depths?
I have a set of minus gage pins. that how I do it. I don't really care what the groove diameter is as paper patch to bore diameter anyway.

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