.25 Marauder Max Power for 16 shots?

[MP44]

What FPE should I expect if I am looking for the most power I can get, within a 20fps spread and only using just the hammer spring and travel adjustment.  

Any suggestions on where I should start, amount of turns in or out for the two adjustments?

 

[GLPalinkas]

MP44,

Gen 2 .25 Marauder JSB 25.39 gr
My Higher Power Tune HS 4, HT 2 1/2, VMS 5 ccw Hi 858, Lo 835, Avg 849, ES 23, SD 5, FPE 40.65 for 16 shots. 

If you are not familiar with tuning a marauder, check here for more info:
http://marauderairrifle.com/forum/viewtopic.php?f=13&t=1323#p7036

 

[addertooth]

 

 

[LDP]

right around 40 fpe without mods.

 

[MP44]

"LDP"right around 40 fpe without mods.

I was hoping to get a 25.4gr near 850fps so that sounds good.

 

[Saltlake58]

If you contact Crosman, they will supply the "Factory Tune" which I think is about what you are looking for. It is about 16 shots at full power with the Crosman .25 pellet. If my .22 Marauder is any indication, the factory tune will get you around 830-850fps. Past that, you'll need a chronograph to do fine tuning.

 

[ackc1234]

+1 for 850 fps that is where I got mine tuned