FX Crown mk2 issue....fixed for now....

[Bud-sc]

Well I gotten my FX Crown mk2 from Airguns of Utah in March. I did no tuning or anything to the rifle. It was shooting on Medium at around 860fps on avg. The reg set at 150bar. SOOOO I wanted to switch barrels go to a 30cal. Did the switch and the high fps I could get was 814 fps. After I came home from the range I decided to put the 22cal back on and tryed out the rifle well it was shooting in the low 500's!!!! Well after watching 5 hours of YouTube I got it back up to 860 range with 18 grain pellets on "high" power. Remember I was getting this with setting set on medium. Oh well I tried. The good thing is I live only 45 min from FX in Wilmington so may take drive up there in a few weeks. It's shooting consistent ....... 60 shots..... yeah I know I probably can tinker with it some more get it shoot the 860 on medium but nah....I wait till I get to Wilmington. Lol

 

[madeintheuk]

do you have the dual transfer port on your barrel? Did you line up the correct port with the breech? Is your breech oring damaged? There’s a lot of things that can cause the speed to drop drastically like that, most of which are caused by some sort of restriction when reinstalling a barrel. I would check those things before tinkering with tune too much.