I want to do some firelapping on my .22 liners

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bigHUN

bigHUN

Member
Jan 16, 2020
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Canada/L4G7X4
At my place I cannot find any of these Eunjin or Seneca or eventually Samyang pellets. I had a tin for years but ran out recently with a .22 size.
Interestingly nobody came up with an idea to modify or fabricate some sort of crimping tool that would make these grooves on slugs?

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I discuss how I groove slugs in this thread

What is the Purpose of Knurling on Slugs?

I’ve been trying to figure out if knurling reduces or helps a slug's velocity. So far I’ve read that knurling can reduced leading and it can hold lubricants better. I haven’t found much more on the topic. I’ve seen some .45 slugs that @nielsenammo makes that are knurled and I’m wondering why...
www.airgunnation.com www.airgunnation.com

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bigHUN said:
:) Canada here, mid January, -8C and the winter didn't arrived yet .... I am locked down in my mans cave and lasts usually up to April.... ;(
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Same temps here currently. I like to get out to the range in the winter, especially when it's calm. It's quite peaceful and it's usually just me and the deer out in that weather.

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jarmstrong said:
folks have knurled with a pair of metal files, sounds cheap for a way to make a few for fire laping, to hold a little grit
since you are not knurling for size increase, to make them more accurate,,,
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I imagine that just hand rolling them in the grit against a hard surface should embed plenty well. And if not there’s always a bit of grease.

David
 
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Airgun-hobbyist said:
Same temps here currently. I like to get out to the range in the winter, especially when it's calm....
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During that famous covid time, I got cold in January at my range. Internal bleeding from bladder, two days laying in Emergency until they finally decided and gave me a "life threatening surgery". And recovery was brutal after that maybe a next half year...
So I learned in a hard way, and trying now to keep away from outdoors cold between December to April...
Watch your health and stay safe ;)
 
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Yesterday I did a firelapping on two of my 25x700 liners I not use regularly.
I had a half a tin of these Eunjin in 25 cal, rolled into Loctite Clover (grinding and lapping) 280 grit compound paste, and shoot a 20 at lowest speed through each liners, the pellets bounce back from the clay.
Cleaned and washed the liners with Balistol, and pushed a 34gn JSB pellet through each liner - up to a choke - checking for tight spots.
Looks like I opened a new rabbit hole.
I think I had before 2-3 minor tight/loose spots on full length - and now have 5-6 very pronounced tight spots.
I put the exersize aside for a moment, I need to think - what is next?
- to do a polishing first with J-B (blue) and chack again for tight spots ??
or
- to do a 20 shots repeat trying to create=connect more friction spots together - and do the polishing then ??

I need a beer ... but need to get to a store to pick some ... about 10" white sheiss outside :)
 
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