Benjamin Trail NP All Weather .22 Canadian Upgrade

[lillysdad621]

... what have i done... i went in for a little lube and a fiddle, and i found a hole in my piston... then i found the jbweld... so its all back together, its 11 pm and out i go to test, just one shot. wow... that pellet flew into my backrest tree so hard! its a bit louder, still seems smooth (trigger got love and its very much a better unit now)... i'll chrony it tomorrow but im thinking its a bit "faster" than the leisurely canadian pace from before. it had a short piston, a #6 ram and a hole in the piston... i'll report after work.

[lillysdad621]

ok. so 75 shots down the pipe. avg with crosman prems HP is 621.5 fps. louder, much louder than before... almost like a normal np from the US... I bet it will quiet down a bit with use, but never as much as before. shot cycle is stronger. i find myself anticipating the shot... trigger came out good. did a group at 10 yards. stacked pellets in top of each other. at 35 yards i hits a 1 inch disc most of the time (like 8 out of 10 times) but truly i think it was me. (anticipating the shot). it is now a rifle capable of critters out to 50 yards without a doubt. Amazingly enough it is the level of tune on a UK gun. I hope it breaks in a bit... i hope it to be a bit mellower on the shot cycle... maybe i'll reopen it but now im not sure what to do to make it smoother. i lube tuned it and it literally has not smoked at all from shot 1. i used very light moly and sanded the burrs and edges til they were soft to the touch. any ideas?

[lillysdad621]

week later update. got close to 500 pellets thru... she went down from 620s to an average of 589 fps with crosman prems 14.3. the loudness... it was a bit too snappy and i went in the shroud to see if anything could help (the snappiness felt more like excess air turbulence than internal noise). taken apart i too the front part of the "baffle" which essentially centers the shroud on the barrel (by the way, the barrel is short... like 16 inches). then i noticed that the air was just travelling inside that "baffle" but all of it could only come out behnd the pellet. so thinking to use the space inside the shroud as a still air chamber, i drilled nine holes concentrically along the baffle lenght, allowing some of the air to escape into the shroud. i drilled 2 small holes next to the exit hole of the baffle (there are 6 divets around it... so took 2 across from each other and drilled them open. Night and day. it is now as quiet as an R7 again, and knowing that the speed dropped a little it has finally come out right... i have a UK benji!!! i like the shot cycle and the power level is good for pesting good size critters on any size yard. i wish crosman sold a version of this here for everyone to enjoy.