Crosman 600

[bob43]

Probably repeating myself here, but here is the question. Crosman 600, just rebuilt, re-builder (very experienced) can not explain why it miss feeds every 4/5 pels. Seem they jam in the carrier. Putting a new spring in a day or two to see if this improves the situation.
Any help appreciated.

 

[AirNGasman]

Vintage Crosman repeaters are very finicky about what pellets any given one feeds best. Having owned many 600s, in my experience they feed best with medium weight domes and/or wadcutters of the right length.

I've had best luck with 14.3 grain JSB Exacts and Crosman Premiers, RWS Hobbys and Meisterkugelns, and H&N wadcutters (model I don't recall). Even so, don't expect better than 90-95% reliable feeding and you won't be disappointed.

Also even so, the 600 is an awesome piece of vintage engineering; especially given it's a pellet gun that sold for way less than it's worth.

Mine-

 

[ba49]

Contact Henry Ford Airguns in Myrtle Beach South Carolina. He rebuilt mine several years ago and added a power valve. Mine was doing pretty much the same thing and now it functions perfectly. He even made me an extra 10" barrel. I don't shoot mine very much any more but it still shoots great when I do. As I recall he was very reasonable and pretty quick service. Hope this helps.

 

[Airgun-Revisions]

It misfires because your cam is too loose and worn. It’s only the ring that slides over Cam rod. The Cam Rod usually does not wear

 

[Airgun-Revisions]

Rick is the only one that reproduces this ring. Precisionpellet.com

 

[Airgun-Revisions]

That’s assuming the setscrew on the breech is tight.

 

[Roboslug]

I understand that some C600s run with domed pellets, but neither one of my two C600s will. Mine run very well with RWS Meisters or H&N Sport wadcutters. Many pellets are too long for the feed arm and can lead to jamming.

A loose/worn cam ring may cause a jam, but I haven't been able to trace a jam to it. Recently, I replaced the -54/valve body o-ring on a C600 with over 12,000 pellets shot since the last rebuild. I mention this because the ring/cam was new 12K pellets ago and the ring was extremely loose on the cam, but still performed well. While I was I was in there I replaced the 12K cam ring with the original (that had less wear).

JG also has cam rings.

CRS600-029 Cam Ring [CRS600-029] - $41.95 : JG Airguns, LLC

JG Airguns CRS600-029 Cam Ring [CRS600-029] - Cam Ring for Crosman 600, 99, etc.

www.jgairguns.biz

Another aspect of the cam ring/cam relationship can be how well fit or "worn" in the combination is. When my ring/cam was new, the ring did not traverse the cam smoothly until I stoned the edges with a diamond fishing hook file. This might be am issue if the re-builder installed new cam parts.

Jamming can also occur if the barrel/feedarm gap is too tight. My C600s run well with a .0025" gap.

Let us know how it works out.

 

[Septicdeath]

Try useing RWS superdome pellets, they work flawlessly in a 99, 622, 400 38t and 38c. I'm sure they will work in the 600 as well. I never get jams with them.