FX Crown settings help

For 18.1 JSB, set your port to .177/.22, and your reg. pressure to approx. between 125 and 130 bar. Then adjust your HST to get around 885 to 890 FPS, which for me was the most accurate speed. You can use the bigger transfer port but the gun might not be as accurate. Also, the first couple of thousand pellets, make sure you clean the gun every couple of hundred... After that maybe once every tin or two. This is for the 500mm barrel. For the 600mm, you'll need less reg. pressure.

Anytime. Interesting story, I've had my Crown for at least a year now, and have spent plenty of time tuning and experimenting with it as both a .22 and a .177. I wanted to shoot FT, hence the .177, and had been using the .22 for 25M and 50Y BR. And it did well, a very accurate gun that is fun to shoot. I'd gotten tired of changing back and forth between .177 and .22, barrels, scopes, etc., so when I saw a Walnut .22 FX Streamline on AGN Classifieds (very inexpensive), I bought it a week or so prior to EBR. My buddy Nick refinished the stock for me while I was gone, and it looks awesome, but I hadn't shot it except TWO pellets to see what speed it shot with the 18.1s, which was 865 FPS. I also disassembled the gun to check it over and re-seal, plus JB Bore Pasted the old ST barrel.

So I had decided I'd try shooting it at 25M BR this past Sunday, having never shot the gun before, it wasn't even sighted in when I brought it to the range, it didn't have the scope on it, nor the stock. I arrived a little early, installed the stock, butt pad and trigger guard, then the scope (Bushnell Engage 6-24x50), and took a few shots. By that time we were ready to start, so off we went shooting three 25 shots cards at 25M BR. And I shot 243, 247, 241 for 731-26x, first time I've ever shot the gun. Pretty good score in light swirling breezes... I'm thinking wow, half the price of a used Crown, and the same accuracy... So I'll just use this for 25M and 50Y BR, and keep my Crown in .177 configuration for Hunter Class FT. Sometimes we're pleasantly surprised when we buy a used Airgun.

I've got 2 crowns in 22 one with a 380mm other with 500mm barrel. I can't get fps below 650 on the short one. 131 bar. Low port setting and min. hammer setting. Maybe your port wheel is mis-labeled? In my testing the hammer wasn't effective for any pressure beyond 135 bar. BUT the gauges can differ. By a lot on the older models. So, it's best to just fiddle with it, get some numbers over a chony with various setting to figure out what is most efficient. Or just shoot targets. If the gun works, it works. If you want more efficiency or power, tune it accordingly. 

The pre load screw for the power wheel might be backed off and need to be screwed in a bit too?

Stoti