Hi, just registered to this forum, but have been reading it allot as none registered. Allot of good information here
Hope my first post is not to long.
I have a strange issue with my fx crown in .22 which I bought last year:
When I bought it new it was a sub 10 joule version, wich I later installed a high power kit. I mainly used jsb 18 grains which worked great for several thins of pellets, after the full power upgrade. I then decided to try the regular 16 grains JSB`s since I mostly shoot below 30 meters outside my house.
At first they worked great, but after maybe a after 100-300 shots I got random POI changes at 20m. 2-4 shots would go almost hole on hole, and then the next 2-4 would change poi maybe a cm to another location. Went back to 18 grains, but the problem persisted. After trying several things first I then found out the x-liner had lead buildup the last couples of centimeters at the end. Cleaned the liner, and everything was fine again with the 18 grain jsbs. Suspected it might was the 16 grain pellets it did not like, since I had shoot several thousand 18 grains with no issue before that. But after a couple of boxes I once tried the 16 grains. And it did not took more than 50-100 shots before random POI changes appeared. Since it seems to occur at the end of barrel, I can actually see it with naked eye when I look down the barrel using a flashlight. Took the liner out and cleaned it once again, and the everything has been fine so far. But will not use any of the 16 grain JSBs I have, since I am almost sure they are the reason the barrel get lead buildup.
It probably sound strange, but does anyone of you have similiar experiance?
Hope my first post is not to long.I have a strange issue with my fx crown in .22 which I bought last year:
When I bought it new it was a sub 10 joule version, wich I later installed a high power kit. I mainly used jsb 18 grains which worked great for several thins of pellets, after the full power upgrade. I then decided to try the regular 16 grains JSB`s since I mostly shoot below 30 meters outside my house.
At first they worked great, but after maybe a after 100-300 shots I got random POI changes at 20m. 2-4 shots would go almost hole on hole, and then the next 2-4 would change poi maybe a cm to another location. Went back to 18 grains, but the problem persisted. After trying several things first I then found out the x-liner had lead buildup the last couples of centimeters at the end. Cleaned the liner, and everything was fine again with the 18 grain jsbs. Suspected it might was the 16 grain pellets it did not like, since I had shoot several thousand 18 grains with no issue before that. But after a couple of boxes I once tried the 16 grains. And it did not took more than 50-100 shots before random POI changes appeared. Since it seems to occur at the end of barrel, I can actually see it with naked eye when I look down the barrel using a flashlight. Took the liner out and cleaned it once again, and the everything has been fine so far. But will not use any of the 16 grain JSBs I have, since I am almost sure they are the reason the barrel get lead buildup.
It probably sound strange, but does anyone of you have similiar experiance?
