....i have this barrel fitted into a disco breech and an extended prod powertube. 22 shots with 10.5's....845 avg. fill to 2300 psi. very accurate. if you feel u need a longer barrel, just order a .20" lw barrel from goergia.....takes 4-5 weeks, and then you have to do lots of work to make it fit well onto a disco, but it really increases performance. they are 12mm od and $110 for lw. however, the $121 challenger barrel is much easier to fit in. also consider the $80 green mountain .25 mrod barrel.....i made one of those, too...but it's like 14mm od... pretty much have to have a machine shop lathe it down 7/16 od....a local shop charges me $20-30 to lathe down the .25 trail xl barrels to fit into disco breech.....gm barrel much better.
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