crown mk2 continuum advertised FPE ?

Have you raised reg pressure? I got 60 out of a Royale 500 which is very similar with a 600mm barrel. I'd think it would be doable with some tuning and maybe porting the brass inlet (or maybe not necessary)

But with the 700mm I cant imagine it would be too hard.

You're talking .25 cal?

What caliber?

And I don't think it matters much what PA says, but more what FX says on their web site.

My Mk2 is in .30 cal, and is currently sporting a 700mm barrel. FX says the gun gets up to 75 FPE (at the muzzle).

On the highest settings for power and hammer spring tension (factory (or UA) set reg pressure - I haven't changed it) mine is shooting FX 44.8's at an average of 900 fps, for a muzzle energy of 81 FPE.

UA test card shows 44.75 gr pellet at 870, or an exact 75 FPE (with OEM 600mm barrel).

Crown MK2 synthetic stock hammer spring pretension screw at 2 quarter turns from max, Reg=165 bar:

w/ 600mm Superior liner in .25 with Power Wheel at 5.5-

King Heavy 33.95g @ 900 fps = 61.04 fpe



w/ 700mm Superior liner in .22 with PW at 5.5- 

JSB KO 25.39g. @ 920 fps= 47.70fpe

If you look in the thread below this one "Crown Happy" you will read that @jawshunting's Crown came to him from Utah Airguns with the reg set at 160bar. If you look farther down to this thread, you will see my instructions for achieving a (near) max power tune: https://www.airgunnation.com/topic/fx-crown-30-wanting-tuning-advice-please/?referrer=1

Good luck

The way it was explained to me by my local dealer is the fpe claim is kinda misleading!!!

Have to do mods to achieve those numbers like heavy hammer with dual transfer port and higher reg pressure....stock gun from the factory wont get those numbers!!!

It's a way to get a little deeper in your wallet...

Same deal with my Maverick .30...they claim 107fpe but not without some add on tweaks!!!

James from Michigan 

Looks good. I'd leave it there, but if you need to max fpe, then max out the internal hammerspring pretension screw, put Transfer Port wheel on High, Power Wheel on Max, and begin raising reg pressure(1 quarter turn counter-clockwise at a time) and shoot over chronograph. When fps begin to drop, decrease reg pressure 1 quarter turn. Continue to shoot over chrono to verify stable fps. This will be your max power. You may try moving reg in tiny increments to further "dial in" your very max fps. Btw, the AMP regulator in your MK2 is supposed to be rated up to 170bar

There's something going on with these mkIIs. I think what it is is that the valve is larger. And the increased surface area of the valve seat/seal is making it harder to open. With what I'm assuming is the same hammer that the mkI's use. That's about all I can figure. The gun should be capable of more power than the mkI's but I think the mkI's end up making more power because the hammer weight is the same, and the mkI valve is easier to open

My mkI with 700mm barrel, 150 bar, 7gm added hammer weight, and massaged ports makes just under 65 fpe with 25gr slugs.

Hmmm that's another thing.... The valve on the mkI is 5.5mm. It is actually perfectly suited for .22 caliber. I've put a larger valve in mine, and the gun lost power. And consistency. Ideally you do want the valve to be the same size as the bore.

I wonder if the mkI valve seat and stem/seal is a direct drop in or not

Mine came with the reg set at 140 bar shooting the 25.4 JSB's at 910 with hammer wheel on 5. Lowered the the reg to 110 now shooting the 25's at 955. .25 cal

18.13, 

Then a lower reg pressure will more closely "match" where your HS tension is already set. Any idea where your hammer spring pretension screw is set now?

No I haven't had the stock off of it just lowered the reg. thing is shooting great with 25.4's 33.95's and NSA 29's I'm probably not going to mess with it. Yea right

 

Nice to hear you it is performing well for you. For most people, enjoying good performance is usually more important than knowing exactly whatever numbers(fps or fpe) the gun is "tuned" to. Some advice I got when I was younger: If something makes you happy, try not to screw it up.