Here's one I'm especially proud of and is modded all over, doing 12fpe at 15 pumps.
Jim Gillilan's Custom 1322 Carbine w/Custom Stock
Stock is Teak from Thailand and super light weight 1322 Carbine!
It depends on the valve volume, October 26 2011 at 1:37 AM CO222 (Login CO222) Crosman Forum Member from IP address 22.214.171.124 Response to good call the fpe is exponential
Approximately proportional to the bore volume, which is a square relationship,
but the relationship drops off as larger bores deplete a given valve volume more.
Bore volume ratio per length: (.177 , .22, .312) is approx. 1 : 1.5 : 3.1
The way I did the receiver it did away with the clamshell, it can easily take 9mm or up to .50 barrel.
After working on 1008's, 357's & nightstalker I had enough of exploding clamshells.
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