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Salvaging Damaged Pellets

Printed From: Kiwi Airgunners
Category: Technical
Forum Name: Pauly's Technical Area
Forum Description: Technical information, Modifications and DIY projects are all in here
URL: www.kiwiairgunners.co.nz/forum_posts.asp?TID=1130
Printed Date: 23 Nov 2024 at 5:19am
Software Version: Web Wiz Forums 10.14 - http://www.webwizforums.com


Topic: Salvaging Damaged Pellets
Posted By: KiwiTR6
Subject: Salvaging Damaged Pellets
Date Posted: 21 Nov 2024 at 1:42pm
Our local club regularly shoots with pistols indoors at 10, 12 and 15 yards and I've found that the 13.43gr JSB Exacts work best in my guns.  However, they're not currently available from retailers here so I recently imported several tins of 500 from Krale in the Netherlands.

Whilst the packaging was OK, about 90% of the pellets suffered skirt damage to varying degrees whereas some heavier pellets I'd also ordered were undamaged.  My assumption is that the very thin skirts of these lightweight pellets were damaged by movement inside the tins during transit and this may be the reason that no one is retailing them now.

Not to be discouraged, I came up with a plan to make them usable.  My setup is pretty crude, but it works very well so I thought I'd pass it on. 

Originally I was going to machine up a die on my lathe but being the lazy bugger that I am I opted to form one inside a good pellet using JB Weld.  I lightly smeared the inside of the selected pellet with silicon grease, mixed up the JB Weld and holding the pellet in a mini vice with rubber jaws, packed the epoxy in with a short piece of 1/16" welding wire placed in the centre.  When it was set, I remove the pellet and installed the wire into a short piece of dowel.

For the outer former I had also planned to make something on the lathe, but having some Crosman spares lying around I decided to try the breach feed end of a 2240 barrel.  With the barrel held vertically in the vice and a 4mm carbon fibre rod inside it sitting on blocks of wood on the floor to act as an adjustable stop, I was able to rapidly process several pellets with excellent results.  The pointed tip quickly broke off the die, but I realised it wasn't needed so roughly cleaned up the broken face with a file.  Silicon grease was applied to the inner die every 20-30 pellets to minimize wear.

The use of the carbon rod was a lucky choice as it ended up acting as a spring holding the pellets a little high when inserted but flexing and allowing the pellets to seat as pressure was applied to the die.  It also allowed me to easily lift the pellets out when finished.  At around 10 pellets per minute, a full tin took me about an hour to process.

The recovery rate was about 95% with the majority suitable for competition, maybe around 30 not to that standard(which will be used for chrony testing) and 10 or so not worth mucking around with.

Just 3 more tins to go Ermm












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FX Wildcat MK111 BT Sniper .25
FX Dreamline Classic .22
Diana Outlaw .22
Cometa Fenix 400 .177
Weihrauch HW50 .177
Crosman 2240 PCP Custom .22
Crosman 2250 PCP Custom .22
Brocock Grand Prix .22



Replies:
Posted By: nunga
Date Posted: 21 Nov 2024 at 2:28pm
nice work


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2nd place HP springer - WFTF World Championships 2014





Posted By: J-S
Date Posted: 21 Nov 2024 at 2:45pm
Cant be wasting too many pellets in this economy, nice one. 

While you have a bunch of bad ones, id be keen to see if the rumours are true that JSB thin skirts and soft lead will blow out into the rifling - minor skirt damage may be blown out into the rifling to engage well and shoot accurate..

shoot a bunch of damaged ones then good ones and check grouping...


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https://www.instagram.com/js_airguns/" rel="nofollow - J S Airguns
Air Arms TX200('s)
Theoben Sirocco
HW77
FWB 300s
Webley Patriot
One or two others...

Current projects:
Too many..


Posted By: KiwiTR6
Date Posted: 21 Nov 2024 at 3:01pm
A great idea!

From my very limited experience...

I thought, up until recently, variance in pellet weight was the cause of my 'flyers'.  I'm no longer of that opinion.

I've noticed that the first shot from a fresh magazine (after changing mags mid shoot) is almost always astray, which indicates to me that the skirt is damaged when the first pellet is pushed home by the probe as it also precisely aligns the mag.  For this reason I have now resorted to single shot loading of all of my target guns.

So, I am skeptical that out of round skirts get blown true and come right but the way to find out is to test as you suggest.  I'll need to replace the red dot with a scope to confirm or otherwise but should hopefully have a definitive answer for you within the next day or so.


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FX Wildcat MK111 BT Sniper .25
FX Dreamline Classic .22
Diana Outlaw .22
Cometa Fenix 400 .177
Weihrauch HW50 .177
Crosman 2240 PCP Custom .22
Crosman 2250 PCP Custom .22
Brocock Grand Prix .22


Posted By: kruzaroad
Date Posted: 21 Nov 2024 at 3:38pm
I'd be keen to see if there's a difference in depth of rifling marks in the head of the pellet.
Could be that in that millisecond that it takes the damaged part of the skirt to flare, that the undamaged part of the skirt has started to lift the head on the damaged side into the rifling, which then corrects as the pressure equalises going down the barrel.
Or the other way around, the air passing the gap and expanding pushes the head down in to the rifling.
Just a thought mind, have no real data or evidence to back this train of thought up.


Posted By: KiwiTR6
Date Posted: 21 Nov 2024 at 7:32pm
OK, some preliminary test results at 10m using my Dreamline set to low power to save me swapping pistol scopes at this stage.  I normally shoot 18.13gr JSBs with this rifle so it may not be quite so receptive to the 13.43gr pellets tested.

Far from definitive, but generally as I would have expected.  Ten rough pellets and ten good ones, five into each target.  I will try again using a pistol and report back in due course.

Damaged skirts shown below.








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FX Wildcat MK111 BT Sniper .25
FX Dreamline Classic .22
Diana Outlaw .22
Cometa Fenix 400 .177
Weihrauch HW50 .177
Crosman 2240 PCP Custom .22
Crosman 2250 PCP Custom .22
Brocock Grand Prix .22


Posted By: kruzaroad
Date Posted: 21 Nov 2024 at 7:35pm
What distance ?
Nice grouping


Posted By: KiwiTR6
Date Posted: 21 Nov 2024 at 8:24pm
Just 10m in my shed.  The pistol will be a more realistic test when I get to it.  We have a red dot pistol trophy shoot this weekend so I'd rather not swap it out until that is over.


-------------
FX Wildcat MK111 BT Sniper .25
FX Dreamline Classic .22
Diana Outlaw .22
Cometa Fenix 400 .177
Weihrauch HW50 .177
Crosman 2240 PCP Custom .22
Crosman 2250 PCP Custom .22
Brocock Grand Prix .22


Posted By: mercs
Date Posted: 21 Nov 2024 at 8:35pm
Before and after is quite extraordinary.
Crosman barrel = so useful universal tool.
I have a 6 inch scrap cut-off if wanting to make a permanent setup.
Nicely done.


Posted By: kruzaroad
Date Posted: 21 Nov 2024 at 8:38pm
Best of shooting to you for the pistol comp.



Posted By: KiwiTR6
Date Posted: 21 Nov 2024 at 9:06pm
Thanks Kruza, it'll be a lot of fun regardless of the results Thumbs Up

I might grab that off you Mark, it's not much good for anything else so I wouldn't feel bad about taking a welder to it....



-------------
FX Wildcat MK111 BT Sniper .25
FX Dreamline Classic .22
Diana Outlaw .22
Cometa Fenix 400 .177
Weihrauch HW50 .177
Crosman 2240 PCP Custom .22
Crosman 2250 PCP Custom .22
Brocock Grand Prix .22


Posted By: JasonEdward
Date Posted: 22 Nov 2024 at 12:05pm
Great thread with some rare data re damaged pellets.

Best of luck with the shooting comp and I'll look forward to more testing of damaged pellets re POI... 

thank you for your efforts!



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