My Marauder 25. I need help

November 9 2017 at 4:22 PM

Skip in WV  (Login SkipinWV)
YF12

Goal: with a 25.4 grain pellet. 40 ft lbs. That equals about 850 fps.

Here is what I've done so far:
1. Installed a heavier hammer spring. Max speed 900, but terrible power curve with
only 10 good shots, averaging 875fps.
2. Installed a Lane Mk8 regulator. Max speed 750
2. Added an FFH. Max speed 750
4. Replaced the TP with a piece of tubing. Max speed 750.
5. Replaced that valve spring with a lighter one. Max speed 750
6. Added a Lane regulator extension tube for an additional 10cc volume. Max speed
750.

As I see it I have 3 options left
1. Increase the regulator pressure.
2. Increase the TP hole in the valve.
3. Increase the TP hole in the barrel.

If any of that works remove the 10cc extension and see what happens.
I hope someone has some other suggestions?

 
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