Message-ID: 
Newsgroups: AIRGUN.LIST
Ld,
    I did my caveman measurements and this is what I came up with. The ID of
the factory seat will hold the smooth end of a 5/32's drill bit snugly. The
replacement seat ID is larger, I can wrap a piece of matchbook halfway
around the drillbit and still slide it into the hole. I measured the
matchbook thickness against my feeler gauges and it is closest to .018in. So
I am saying the aproximate difference in ID is .018in. The height of the
seat is .024in greater on the factory seat than on the replacement seat
(feeler gauges again to estimate). Wouldn't this work like getting a great
lift on an engine camshaft when you use a lower seat since the  hammer can
push it flush with the valve body before losing contact? Also will .018in
increase in ID allow a significantly greater amount of air to escape per
shot? Wish I could give better measurments but I'm working with the tools at
hand. I'll report back with the differences in velocity as soon as I chrony
it .
Bob P.
I've been seeing some shoot alot harder than others, you may have hit on the
reason!
ld
Bob Prokopczyk wrote:
> Larry,
>     Yes, the steel ring was there. The delrin? part of the seat seemed
much
> shallower than the old seat and the id seemed to be larger. I don't have
any
> neat toys like say an inside micrometer but I'll test it cave man style
with
> the non business end of drill bits to see if it's just an illusion.
> Bob P.
>
> Bob,
>
> Did the seat still have the steel re-inforcement sleeve in it?  ld
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