Quote Originally Posted by MattyBoy View Post
Absolutely

I have 8 AA Sidelever Springers from the 1980s all of which run very nicely on O rings

But there are people who vehemently insist that they are out of date and should not be "revisted"

Can you believe it?



Matty

The predecessor of those was the Jackal. Made by Sussex Armoury using as a main subcontractor the company that later was AA. From a very reliable source who worked there on a top secret project (cant be discussed due to secrecy agreements on an open internet forum) I got some information on the use O rings in the Jackal. JB said that after blacking and before assembly the cylinders were lightly honed using something called a Flexi-hone. These were brought in from the US and looked like bottle brushes with abrasive balls in the bristles. This removed any blacking and left a crosshatched finish. When checked for velocity some .22" Jackals went over the top and a quick production line fix was to ream the loading tap slightly oversize to drop velocity a little.