Bumping the barrel /shroud and having impact changes....
My first PCP was a simple Marauder. I noticed no issues with POI changes when handled. I bought a Diana storm rider for fun just to shot invasive birds close to the house. I noticed it would shoot a few inches left or right at 50 yards for no apparent reason. I finally realized if I bumped the barrel, it would go wacky. I got the band to attach to the tube and barrel. It was worse since it would bind and lock the barrel in whatever position it was bumped. Now realize. I am NOT taking a hammer to it. just leaning it up against a window frame or laying it on the carpeted floor. I bought a Avenge X next. Same aggravating issue.
Some will say, just shoot it to confirm zero. BUT, the main reason for an air gun is to shoot invasive birds off my purple martin housing at about 30 to 50 yards. I need it dead on at all times. If I shoot my sight in steel (near the martin housing), I will scare off the poop bird. If it is too far off, I might damage my martin housing which is worth 3x the air rifle!!
With my Aveng X; It was suggested to take off the band connecting the barrel/shroud and the tank. This works...BUUUUT eventually the recoil made the shroud slide past the little detent screw that hold it to the barrel!!! The *&%^ shroud is tight and I need to get it off some day with heat and more force. I am currently using a aftermarket band on the shroud and tank. It is ok, but I still am not confident on it holding zero.
I am looking to upgrade from the AVeng X. It is VERY accurate. need to shoot the 30 yard challenge. I think It could do ok. If I spend $1500 buck or so for a higher quality rifle and I end up with the "don't touch the barrel" bs I will throw it in the creek!!
Believe it or not I DID do a search on this topic. I see it appears to be a "thing" and I am not crazy. I would THINK a bullpup design that supports the barrel more would not have this issue...but I don't know if I like the looks of a bullpup. The RAW and guns like it with a skinny barrel hanging out there forever just worries me.
So my search is for a dead nut accurate .25 (.22 2nd choice) at 50 yards that can take a bit of bumping around. I would like it to be right up to or close to being used in accuracy competitions. I have won a few bench rest matches in the past with a powder burner, so I am drawn to the crap like a moth

I could pound the barrel with a hammer and not worry about it shooting 2 inches left/right for no reason....
I am fine with a used gun (leak free) looking at the FX Wildcat 2-3, FX Maverick. The huntsman but the barrel band scares me for bumpies. The FX DRS is intriguing, but I have not seen a lot of reviews yet.
Free for opinions.. Thanks