Some UNIQUE valve mods .... GREATER flow into valves interior ( M-Rod Valve)

[Bill G]

Bill,
what you saying above on sizes hits home with my personal .22 M-rod valve mods. ( Granted its Regulated, but still flows BIG TIME )
Behind poppet is .250" diameter and stem turned to @ .100", Transfer passage out valve body, transfer tube, hole feeding barrel ALL at .165"

Indeed the M-rods valves ( .177 & .22 one style ...... .25 another style ) can be modified in so many ways.

Kinda cool ....
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When you go to a regulator I imagine it really simplifies the valve setting and allows great efficiency and consistency.  The .25 just doesn't allow for a proper plenum to use a reg and still get the potental power that the .25 is ment to develop.  By going to the .156 porting I increased my efficiency to .94 from .89 and the avg fps to 920 with the same number of shots.  The max port I can go to is .187".  I wonder If I could get 1.0 efficiency if I increase to the max size?  I'll find out soon enough.