8 3/4" barrel.Just chrono'ed... I'm thrilled. This barrel is cut to be halfway between the 10" and a flush muzzle. It has a crack to it (the 10 sounds silenced... quietest I've shot since my first gun, a Daisy 25 BB gun). Low: 313.5, High: 318.3, Av: 314.7, ES 6.75Eric,Those numbers are nice! If I remember correctly that is a 1 in 16 twist, I'm really interested in the groups that you will get out to 30 yards and what the trajectory will be. I'm really thinking about a "friendly" .177 with a similar velocity. Guys, this is a great build! Eric, you have made some great decisions and have done your research.BobH.
That's with the .040" dish, correct?stalwart,It took me awhile to comprehend the .040" dish. The decompress is as I remember .065" deep after the second trip to the lathe and the max. dia. is .900" . Sounds like my O ring is gonna die ,,,,soon. The O ring may have have 1300 plus cycles. I do keep the piston greased and the breech O ring shinny with oil.,,,,,,,,,,,,,,,,,,,, Think I'll go kill a can, I need a pellet fix.BobH.