FX Crown .22 Does this shot count seem right?

I'm no expert, but I think, with no other changes, going to a larger port will result in a bit more power and fps, and lower shot count.

A huma reg will not change anything regarding efficiency. The reason it gives more shoots on a gun like the wildcat is that the reg fills less space in the tube, and gives a larger plenum size, that is not the case on the crown. So as long as your reg is working fine when you shoot, there is no need to change it. You say the velocity drops when you are off the reg? That looks like your gun is tuned right at the max velocity with the current reg pressure you have.That might not be the most efficient. Normally the velocity should increase when you are off the reg. It is also hard to "copy" settings from other guns, as the pressure gauges is not that accurate, and the guns might not behave the same. 

Might try the power wheel at 4 or 5 over the crony for FPS change and maybe save a little air for a few more shots. Mine is at 5 with same FPS.

If you compare to bob-O`s string, he use the .25-.30 (max) transfer port setting. You can try that also. It might give you a litle more speed, but you can then back of the hammer wheel also.

Hi,

I suspect that your gun is set up for .25 with those settings. I would like to see what it does at default settings first, so reg pressure at about 120-130 bar and hammer spring adjuster between 18 -18.5 mm. I really think that your FPS is great, IMHO the 18 grain jsb seem to like between 880 and 915 barrel dependant. Its a small adjustment that needs to be made to increase efficiency, but the adjustment needs to be made to the system rather than just one component, I.E. reg and spring, maybe port...

While I am far from an expert, I have generally found that with .22 air rifles, that a lower reg pressure tuned to the "knee" of the power curve tends to yield better results in terms of shot count. If your gun is performing well at 888fps then I would try and achieve that speed with a lower reg pressure. The lower set point will result in more shots, tuning the spring to the Knee will hopefully also result in a more stable shot cycle.

For reference, if you haven't seen it:

https://www.airgundepot.com/fx-crown.html

I'd go with tor47's suggestion before messing with the reg.

Especially if it is shooting, as you say, 'lights out' already.