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All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: SpiralGroove on November 29, 2015, 06:21:56 PM

Title: Performance Unsing Old Co2 Cartridge
Post by: SpiralGroove on November 29, 2015, 06:21:56 PM
Hey Co2 "Users",
A friend gave me some older Crosman Co2 cartridges :D
However, when shooting my Son's QB78 (.177), at 13 yards, the gun is not consistent :P.

Now the cartridges could be upwards of 5 to 10 years old.  Could the age of the cartridges be the reason for accuracy issues? Or should I look elsewhere?

Kirk
Title: Re: Performance Unsing Old Co2 Cartridge
Post by: DOKF on November 29, 2015, 06:26:26 PM
It is possible that the cartridge seals may have allowed some CO2 to leak out, but the CO2 itself will not have deteriorated.

What type of inconsistencies are you noticing?
Title: Re: Performance Unsing Old Co2 Cartridge
Post by: SpiralGroove on November 29, 2015, 08:37:12 PM
Groupings are at about 1.5" at 13 yards :P

I cleaned the barrel very well and did notice some rusting.  Barrel has one rough spot that can be felt with the patch about 1/2 way down, but I can't image it could affect accuracy that much.

Otherwise the gun is OEM; never been touched.

Kirk
Title: Re: Performance Unsing Old Co2 Cartridge
Post by: DOKF on November 29, 2015, 10:21:00 PM
Curious ...

Do you have some new cartridges to try as comparison?
Title: Re: Performance Unsing Old Co2 Cartridge
Post by: floydlong on November 29, 2015, 11:19:02 PM
That rough spot CAN and will cause accuracy issues. Get it out whatever way you can. There are others who will chime in on methods to remove it.
Title: Re: Performance Unsing Old Co2 Cartridge
Post by: SpiralGroove on December 02, 2015, 10:44:54 PM
Hey floydlong,
Where are those other guys ;D
Title: Re: Performance Unsing Old Co2 Cartridge
Post by: sr1sws on December 03, 2015, 07:21:19 PM
Quote from: SpiralGroove on December 02, 2015, 10:44:54 PM
Hey floydlong,
Where are those other guys ;D

Well, if it was mine, I might fill the bore with Evaporust followed by JB Bore Paste.

Steve
Title: Re: Performance Unsing Old Co2 Cartridge
Post by: Ribbonstone on December 03, 2015, 07:44:41 PM
Really really old co2 cartridges have a kind of beer-bottle-cap crimped on seal...they'll be the ones to leak. Wasn't uncommon to find "dead" ones brand new. Modern ones (and I guess "modern" means the ones in the last 30 years) are better sealed and much less likely to leak.

If you are paranoid about "off brand" 12gr., can get their weight before your use them (kitchen/diet scape works fine), Marks-a-lot the weight on the side, hold onto them once you've used them, and get their weight empty.  Will find some brands are evidently not filled with 12gr. of gas...more like 9.5-10.
Title: Re: Performance Unsing Old Co2 Cartridge
Post by: lefteyeshot on December 04, 2015, 12:13:07 AM
Did you chrony or was it cold?