BARREL PRESSURE MANAGER II

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  • Last Post 16 April 2019
joeb33050 posted this 14 April 2019

 

 

A .050” hole in the barrel reduces MV about 4% at the test conditions. There is a surprisingly energetic blast of gas coming out of the hole.

 

The .050” was a WAG. A larger hole in the barrel would make for a larger MV reduction.

 

A .050” hole has an area of ~ .002 in^2, so .002 in^2 ~ 4% MV reduction,

 

an .062” hole ~ .003 in^2, ~ 6% MV reduction,

 

an .093” hole ~ .007 in^2, ~ 14% MV reduction.

 

The point is, that drilling a hole in the barrel and then varying the effective hole size with a valve or a through-hole plug allows us to vary MV over a range.

 

A .093” hole drilled through the barrel, a large tapped hole centered in the same hole, and a screw with a through hole .050” dia would ~ 4% MV reduction.

 

A through hole of .062” dia ~ 6% MV reduction,

 

A through hole of .093” dia ~ 14% reduction.

 

Or an adjustable valve would allow a range of adjustment.

 

We are working with a Ruger 10-22 barrel and making a valve.  The 10-22 barrel is easily switched, 22rf is easy, cheap and many flavors are available.

 

And, we’re still looking to see if a valve will tame the high MV fliers.   

 

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mashburn posted this 16 April 2019

This is very interesting and am anxious to see how all of this comes out and what proof it produces.

Mashburn

David a. Cogburn

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