Skout Everything Skout EVO and Epoch

[manabeknives]

This is one of those conversations where I just smile and nod my head

 

[MSR Workshop]

First off .... maintaining velocity of the air moving from seat to barrel is important.
If the exit at seat is smaller than the transfer path to barrel, flow will slow down as the added volume of an oversize transfer path is absorbing energy & some pressure as it fills the excess space attempting to hold the released pressure exiting from the valve seat. Get these diameters better matched the shot cycle will be come crisper and yield a lower ES shot to shot while also using a tad less air for equal speed / power.

My Skout was purchased as a .30 cal and was fitted with the HUGE .340 seat. When I was finally able to get the parts to convert to .22 cal was able to get a Tiny .177 seat and proceeded to modify it to the size appropriate for .22 caliber. then choked the transfer path within manifold.

So how large did you open up the transfer port seat?

 

[Motorhead]

So how large did you open up the transfer port seat?

For .22 ... in memory & not written down.
Seat at @ .280 and transfer exit at .250"
Transfer reducing straw ( Loc-tited in ) done in a shallow taper of @ .260" to @ .180" at barrel end.
* Taper creates sonic choking of the flow having the maximum release of the compressed and highly accelerated air flow happen at the barrel / pellet.

This combo also works in .30 cal only requiring a @ 200-300 psi HP set point increase.

 

[MSR Workshop]

So around 7 mm
That’s pretty large.
I only went up to 3.5 mm/ 0.1377
and I was able to turn my regulator down by over 1000 psi.

 

[Motorhead]

So around 7 mm
That’s pretty large.
I only went up to 3.5 mm/ 0.1377
and I was able to turn my regulator down by over 1000 psi.

For a dedicated .177 .... Seat at .220" and a transfer exit and path to barrel @ .150" should work really well.
If valve is dwelling to long, open up the bleed hole orifice on poppet head a few .000" at a time until shot cycle is a sharp & crisp snap !