Why is Rimfire Ammo Dirtier than Centerfire? - Page 3 - RimfireCentral.com Forums

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  #31  
Old 12-06-2020, 09:19 AM
jaia
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Springer... I have a couple pics y'er gonna want to see.

Barrel is cooling on my 22wmr, but before I sent any,
went to clean the top of the chronograph and saw an interesting sight.
Tiny spheres of GSR in multiple colors...yellow, white and grey.

Pics later today, can't link from my phone.
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  #32  
Old 12-06-2020, 09:35 AM
lotech

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We have many fastidious shooters these days that obsess over "dirty" ammo, something pretty much unheard some years ago when shooters had a greater interest in ammunition that functioned properly and was accurate. Rimfire firearms are easily cleaned; a little bit of powder and lube residue or a lot of powder and lube residue require the same amount of solvent and effort to clean. Smudged fingertips are even easier to clean than guns. Enjoy shooting.
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  #33  
Old 12-06-2020, 11:48 AM
jaia
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Here's how the gsr spheres look in closeup



and with a size reference

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  #34  
Old 12-06-2020, 12:10 PM
springer1
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Jala - That's it !! Is "GSR" Gun Shot Residue? If so, I'm guessing it's from the cartridge, scattered out upon empty shell ejection ? ? ?

lotech - I completely agree, I'm not complaining, sorry if it came off that way ... just wondering what it is.
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  #35  
Old 12-06-2020, 12:17 PM
jaia
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GSR...just like CSI Miami...gun shot residue...those tv forensics shows love it.


Lab Tech: "Yes Chief, the GSR pattern shows he was shot at point blank range."

Chief: "Remind me never to go to the point blank range, everyone ends up getting shot there."
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  #36  
Old 12-06-2020, 01:11 PM
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Yes, it has been GSR from the start. Now what's in it that makes it crunchy and white like salt crystals?
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  #37  
Old 12-06-2020, 02:05 PM
jaia
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Quote:
Gunshot Residue
GSR consists of unburned or partially burned gunpowder particles, soot, nitrate, and nitrites from the combustion of the powder, particles of primer (oxides of lead, antimony, and barium), and particles of the bullet or the bullet jacket that are vaporized when a firearm is discharged (Rowe, 2000).
I've been reading since Springer brought it up.
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  #38  
Old 12-06-2020, 03:14 PM
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Could it possibly be glass?

Quote:
The majority of rimfire ammunition examined in this research contains ground glass in the primer, which functions as a frictionator. These ammunitions produce a small number of gunshot residue particles containing glass coated with other primer components, which we refer to as glass-containing GSR (gGSR).
https://www.sciencedirect.com/scienc...79073818307102
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  #39  
Old 12-06-2020, 05:41 PM
jaia
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It's a Heinz 57 of parts and pieces as far as I can tell.
Even the h2o created by the reaction gets involved as the universal solvent.
Carries molecules of the mix down the bore condensing on the microparticulates
as it decompresses, creating all those tiny spheroids of assorted reactants.

They could be salts very easily, just not y'er typical NaCl.

Last edited by jaia; 12-06-2020 at 05:45 PM.
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  #40  
Old 12-06-2020, 06:41 PM
springer1
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Thanks guys !
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  #41  
Old 12-16-2020, 12:13 PM
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A lot has to do with the barrel. The 10/22's I've sent to Randy at CPC can be shot hundreds of rounds, and they still look CLEAN. You look down the barrel, and they barely look like they've been shot. I have a couple Anschutz 1710's, and they look TERRIBLE after only a few shots.

Part of Randy's tune up is lapping the barrel. I think the smoother barrel helps keep it clean. I didn't believe it until I saw it... but, that's my experience.

Good Luck
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  #42  
Old 12-16-2020, 01:17 PM
bmwmc
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My complaint with rimfire isn't how dirty it gets the barrel. It's how dirty it gets the action in any type of semi.
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