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Crosman hollow probe build |
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GOODold308
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Joined: 28 Aug 2024 Location: Napier Status: Offline Posts: 23 |
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Topic: Crosman hollow probe buildPosted: 29 Aug 2024 at 2:37pm |
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Great work and thread thread I'm definitely going to consider a hollowed out bolt for my cr600w build.
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kruzaroad
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Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2691 |
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Posted: 28 May 2023 at 2:03pm |
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Be interesting to see if it diesels.
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RangerPete
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Joined: 19 Apr 2023 Location: Cambridge. Status: Offline Posts: 1035 |
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Posted: 28 May 2023 at 1:35pm |
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This is the one I have (I’m a bit of a bicycle nut).
It is a liquid that dries and leaves a light white waxy residue. The Napier power pellet lube requires you drop 3 or 4 drops into a new tin of pellets, then close the lid and gently roll it over getting the lube evenly distributed through out the tin and over all the pellets. I’m going to try the same with the chain lube. The next time I’ve got the chrony set up I’ll do a full test, with and with out lube, group size at 30m etc… ![]() Edited by RangerPete - 28 May 2023 at 1:36pm |
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Pauly5
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Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1676 |
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Posted: 27 May 2023 at 4:47pm |
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let us know what that chain wax product is.
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RangerPete
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Posted: 27 May 2023 at 4:22pm |
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Jwabfrog, I have tried the Napier power pellet lube once a long time ago.
Unfortunately I didn’t do a before and after test to see if it actually improved accuracy and velocity, I just bought it and used it, and the little air arms shot beautifully, so I just kept on always using 4 or 5 drops of the lube in every new tin of pellets and kept on blissfully shooting… I’d like to get some more and give it a good “scientific” test. I’ll also do the same using the bicycle chain wax. |
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RangerPete
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Posted: 27 May 2023 at 4:07pm |
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That sounds reasonable Paul, that a stronger blast or air has more chance of opening up a skirt.
What have you guys tried as pellet lube? I know there are commercially avalible little bottles, but are there any home remidys that are cheaper or more easily avalible? I saw one guy on u tube, Tinys rifle stocks or something, (he shoots some impressive groups so he’s probably worth listening to) using a bicycle chain wax which is in a liquid form and dries fairly quickly. I think another guy was suggesting automatic transmission fluid… do u think that would produce dieseling? |
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Pauly5
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Posted: 27 May 2023 at 2:52pm |
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I don't know, but I'm guessing the more powerful the pcp, the better chance of the instant blast of pressure opening up a bent skirt.
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kruzaroad
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Posted: 27 May 2023 at 5:09am |
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Yep not for hunting. He's also using a pcp which may be firing at good fpe.
I wouldn't go by that myself as I've spent the time shooting unsorted pellets verses sorted and never got that good result with damaged pellets. Each to thier own. |
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jwabfrog
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Joined: 13 Nov 2021 Location: Thames Status: Offline Posts: 159 |
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Posted: 27 May 2023 at 5:01am |
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PCP testing accuracy with damaged pellets:
https://pneumaticdetonation.wordpress.com/2017/08/02/bent-pellet-skirts-and-accuracy/
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kruzaroad
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Posted: 27 May 2023 at 4:36am |
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Head sizing and weighing reduces Flyers. I have no dought on that from target shooting on farm.
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jwabfrog
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Posted: 27 May 2023 at 4:11am |
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Tinbum sells pellet sizers - obviously only good for reducing pellet size. Link below
https://www.airrifletuning.com/store/tbt-22-pellet-sizer/ I've also been interested in using lubricant but have never actually tried this - Napier sells prelubricated pellets which I think I might try as well as pellet lube: https://www.napieruk.com/products/power-pellets-22-target-tin-of-500-pellets https://www.trademe.co.nz/a/marketplace/sports/hunting-shooting/air-guns-parts/ammunition/listing/4147949924 https://www.napieruk.com/products/power-pellet-lube-10ml Lots of videos on youtube covering pellet cleaning and lubricating: https://www.youtube.com/watch?v=n9lNFKD3Q-0
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Pauly5
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Posted: 27 May 2023 at 3:01am |
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I guess sorting first, visually and weighing would be the first step, then deal with the damaged skirt ones, or use them for practice.
I have a brass pellet sizer that I used to use when shooting FT, but I don't think i'm good enough for it to make a difference anyway. I have also washed pellets in the past, applying a couple drops of lubricant to a tins worth. To be honest, I never spent enough time at a bench validating if there was ever any benefit. Now I just check for bent skirts before loading. If I was target shooting I would pre-sort and weigh.
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kruzaroad
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Posted: 27 May 2023 at 2:24am |
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It's called eyes and a vernier+, scales, or sorting your pellets.
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RangerPete
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Posted: 26 May 2023 at 4:06pm |
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Ja, what you say about the barrel not offering enough resistance to “grip” the pellet while the probe reforms a damaged skirt, makes perfect sence.
I wonder if u can buy a mini press that would reform the skirt and at the same time swage a pellet. Maybe the ultra competitive competition guys have already come up with one to make sure every pellet is perfectly uniformly shaped and sized… Like powder burners who work out individual case volumes and weigh every case for uniformity, I’m sure a pellet swager/skirt uniformer would greatly increase the accuracy of any air gun. |
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Pauly5
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Posted: 26 May 2023 at 3:46pm |
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Hi Pete,
I did do some trials to see what sort of engagement was made on a good pellet, and I don't think that there is enough resistance from the barrel for the probe to push the pellet against. So while it won't straighten out a deformed skirt, it does look like it kind of seals inside the skirt. But it would be possible to make something that you drop the pellet into and push a probe into the rear of the pellet. I'm sure someone has tried it.
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