Reply With Quotemight be easier to back off the mainspring a bit... would probably shoot better that way too...
Registered User
Hi chaps. Any one had any luck removing the little ball bearing cover from the transfer port restrictor on a .25 BSA Lightning as mine requires adjusting down to lower the power on it. "going a bit "hot" with some pellets. It looks like it is bonded in with some thread lock ? or are they pressed in with the metal cylinder heated slightly at the factory.
From my thinking the ball bearing is a security plug to cover the small Allen Grubb screw. Don't really want to interfere with the spring set up as it shoots really smoothly and consistent It appears to have a standard Piston & does not have any extra weights fitted.
Last edited by metalmickey; 28-09-2020 at 05:34 PM. Reason: MORE INFO
Registered User
might be easier to back off the mainspring a bit... would probably shoot better that way too...
Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.
Even better looking than a HW35
I thought it was a grub screw they used?
Pete
Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
Registered User
My Supersport .25 certainly has a grubscrew adjuster, no idea about the lightning.
Registered User
It does sound like a later model factory set and fitted with anti tamper.
I've had two .22 Birmingham Supersports new,and both were over.
Both had piston weights fitted,export mix up perhaps?.
Posting Permissions
