Finally found a Silver Streak

[threesuns]

Oring size is 004. rite in-between the crosman .177 003 and .22 005 Orings

[Hoosier Daddy]

Where the heck have you been Brian?
Welcome back!

[threesuns]

Wife has left on a girls trip and in between projects I thought I’d revisit my Silver Streak. Hadn’t really rung it out fully just site in with 4-5 pumps in the basement.
During the rebuild I was thinking about increasing efficiency, given the age and condition, less pumps is more. So I had made and installed the following (see pics)
I finally put a few shots over the chrony and had to share! Old Blue really likes the 11.42 H&Ns so I’ve got a good supply and 8 pumps in the Silver Streak shocked me (last pic)

[Ascot500]

Is that the exhaust chamber spring in the pictures?

[threesuns]

I made the check valve spring guide to replace the internal valve washer and reduce valve volume a little bit.

I thought 800fps out of a Sheridan only happened with a Steroid treatment and alotta pumps!

[19Sheridan57]

 A speed of 786 fps from a Sheridan is impressive !