IMHO, the crosman 2200 has the greatest power potential of all currently offered crosman pump rifles but is deficient in one crucial area. In pursuit of looks, crosman failed to come up with a breach that could effectively transfer gas to do work on our pellet. the bolt has no o-ring, the barrel fits loosely in the breach block and the receiver does not hold the breach block securely to the transfer port seal. If crosman coupled this powerplant to the 2260 action they would have a winner, a modern 1400 perhaps?



In the next sections I'll address some of the modifications I did to my own 2200 to achieve better sealing, the first three mods can be accomplished with minimal tooling, the fourth requires patience, some machining skills and must be done before the first three modifications (if you choose to do it). This may not make your gun into a Wolgast but it'll sure improve on the factory original.

Transfer Port

This ones simple. Most of us are familiar with the 2240 type transfer port, the ring and the little square cut seal. If by chance you've made a stop at your Crosman repair depot you may have seen various lengths of that square cut seal, I purchased a small assortment for tinkering. The longest is for the 1400, the two intermediate lengths are used in various generations of 760's and the shortest is used in the 22xx, 13xx, etc.



The one you're looking for is the next length up from the current 2240. It'll take a little extra wiggling to get the receiver halves to close but it's worth the trouble.

Valve retention

Follow the instructions in Bio's "Valve retention upgrade" to secure you're valve with one screw, as you'll see, the factory uses nothing but the stamped valve stop.



Due to vacuum created on the intake stroke, the valve gets pulled back and forth creating wear at the valve stop as well as additional stress at transfer port.

Sealing the barrel to the breach block



Apply 1 to 1 and a 1/2 drops of medium strength thread locker around the barrels transfer port, just enough to circle the port. Keep the port up right and slide the breach block into place, use a drill bit to align the ports, tighten the barrel set screw and let sit over night. This basically creates a gasket between the breach block and barrel.

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