GTA

General Discussion To Gateway To Airguns => The Shop => : kiwi September 10, 2009, 08:23:16 PM

: CO2 barrel length
: kiwi September 10, 2009, 08:23:16 PM

Hi..What would be the best barrel length to
use with a boss valve ?..18" or 24"

Just ordered a 2240 / RJ long riser breech / B&A  boss valve
need to get the barrel under way..

So I'm hanging out for it all to arrive...

Pete

: RE: CO2 barrel length
: SDale September 11, 2009, 01:51:59 PM

24 inches in .22 and a shimmed factory hammer spring would be the best way to go with the boss valve.

: RE: CO2 barrel length
: kiwi September 11, 2009, 01:56:31 PM

Thanks ....But when yer say shimmed ! ..
To incresse spring preload ?
& how thick should the shim be ?

Pete

: RE: CO2 barrel length
: SDale September 11, 2009, 01:59:07 PM

Yup, increase preload just a bit.

I used 2 washers that fit inside the rear tube cap. I believe they were #10. Can't remember. But the total thickness was just a hair over 1/8". I know it doesn't sound like allot, but it made  a BIG difference!