Benjamin Trail NP XL Air Rifle 22

[grizzlyadams]

barrel lockup, i have an older winchester 800x that does the same thing. the barrel has a bit of up/down play when in battery

[Finchlake]

WOW, all these theories has my head spinning, I think I'll put the gun up and get my jig pole out and go crappie fishing. 

[Mike 4888blues]

  Thanks I'll remember that info.
 In another post. A member said he would shoot bulls eyes  then  after 10 shots his poi  would drop  so he ran a dry cleaning patch down the barrel cupple times and then it would shoot again perfect bulls eyes. then 10 shots later it would start to drop again
 
I use cphp because they are inexpensive and work well with my rifles, but  now I am going to wash  them to remove the powdery substance and dirt  and loose lead chips found in a tin.
 but un like others I will not be spraying any lubricant on them, just  thoroughly blow drying them
 

[Finchlake]

I went and bought some patches and Goo Gone. I made a cleaner out of weeder line, and gave the barrel a good cleaning. It was filthy, patches just kept on coming out black. A cold front is passing through here today, It's to windy to try to shoot a good group. I let you know if this makes a difference.

[Mike 4888blues]

  I would  wash the pellets with soapy water. use a jar  and a small screen sive to empty  the dirty water and pellets into
   I air  dry them on a towel with a blow dryer  but i don't spray any lube on them afterwards i bet that will keep your barrel clean

[kgoforth]

Like HNT5 said, bet it is lock up issue.

Brass washers from www.airguntoys.com fixed my lockup issue, also had the pivot bolt problem with it not staying tight, drilled and tapped a set screw for that, replaced trigger 10 minutes after taking the gun out of the package. I have also replaced the piston seal, which got raid of the first 10 shots in a vertical line at 30 yards, added more power, and surprisingly less kick.

Hi.
 the brass washers you mention solved you lock up issues,  what was the problem you had, and how did the brass washers solve  that problem? , thanks

POI was all over the place before I installed the washers, it also got raid of my barrel droop.