Are all CO2 cartridges the same

I read somewhere that Crosman cylinder diameter is the most consistent. But knowing how they are produced, there should not be a diameter variance. One of my CO2 pistols recommends using only Crosman cartridges so that’s all I have on my shelf. I’ve never owned any other brand so I can’t say if there is a size difference amongst different brands. I can measure a couple with a micrometer and post the size if some folks have other brands.
 
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I just happened to have 20 Crossman cylinders in front of me, so I miked 'em. Just a quick measurement near the center of the cylinder. The Average diameter was 0.729 inches. Max 0.737, Min 0.725.

Here's the raw data...

.7370

.7340

.7295

.7285

.7310

.7310

.7270

.7280

.7275

.7285

.7275

.7270

.7315

.7250

.7290

.7275

.7280

.7275

.7305
I’m a little surprised there is that wide of a range.
 
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I just happened to have 20 Crossman cylinders in front of me, so I miked 'em. Just a quick measurement near the center of the cylinder. The Average diameter was 0.729 inches. Max 0.737, Min 0.725.

Here's the raw data...

.7370

.7340

.7295

.7285

.7310

.7310

.7270

.7280

.7275

.7285

.7275

.7270

.7315

.7250

.7290

.7275

.7280

.7275

.7305
thank you for taking the time to measure them, good information
 
I had heard that some CO2 cartridges came with lube inside. At the time, I had Crosman and Umarex cartridges. I cut an empty cartridge of each brand in half. The Crosman cartridge had some lube and grit inside of it. The Umarex cartridge was completely clean. I never bought Crosman cartridges again.
Wow interesting! I've only used Crosman. I'm going to have to try that and if I find the samething I'll try the Umarex. Thanks for sharing (y)
 
I finally cut a couple of Crosman CO2 cartridges and of course when I cut it there was some grit inside (duh) so I used my pipe cutter and cut a couple of them and the only thing I saw was a darker dry color (almost black) on one half of the cartridge. I can only assume its something that is part of the manufacturing :unsure:. I don't have any other brands to compare my findings maybe next time I'll try some Umarex.
 
Just my 2 cents. I only use Umarex as well. I did the same thing as Yamo.
I cut 4 different brands in half. I was surprised at the amount of "stuff" I found inside the "name " brands.
I only shoot the Umarex P2P .50 cal pepper ball guns now. Trying to clean up my Karma a little.
JMHO
Doc
I have heard many, (well maybe 20 or so people), reporting that the Crossman C02 cartridges' have "Gunk" inside. I have used Crossman C02s' for many years. So in this video I test both UMAREX and Crossman C02 cartridges' then cut them open and have a look see. Please forgive the editing Microsoft changed the video editor on me so now I probably need a better computer and a better video editor. Anyway, here is the video.
One final note I looked at both Crossman and UMAREX CO2 Cartridges.
No GUNK, "Stuff" or any other materials powder or otherwise in either cartridges'. Also on my Youtube channel.

 
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