Thanks Rob, There's no doubt that it's finally venting through the two oppoaing ports in the filler valve. I even caught it leaking through the hole in the forward end of the screw-on valve cover. I think there's a very slow leak somewhere that is too slow to be heard or felt. The dogleg fitting is ...

Thank you, Blackbaronfish, that makes perfect sense. In fact, the dogleg bolt had to be persuaded out bcause its hex socket rounded and because John Knibbs charged a king's ransom for the wrong screw, we had to refit the original, with the screw slot we'd cut. So, I've copied your post to my pal and...

Curiouser and curiouser, as Alice said, this is getting wierd. Having had everthing fitted and aligned, my S410 was up and running. Charged to 170 bar, which is what remains in my dive bottle, it stood in the corner happily - not! After an unspecified time, I'd hear Pssshhht. The air was leaking out...

Burneside, near Kendal in Cumbria.

Thanks, I'll get it chronified as soon as I can. I've put my location in my profile as suggested. In the meantime, being able to wound plastic buckets and thin ply is showing that my AA is back up to power. Not an accurate benchmark I know but needs must when the devil drives. I'd like to be able to...

OK, here's a gloating post! There's often a clue when things go wrong and there it was, for all to see. Both mags had become a very tight fit and the reason for this became obvious. The mags were fouling on the brass sleeve at the very rear end of the barrel, So, the barrel was too far into its loca...

Hi, here I am , seeking brains to be picked...again. I've done a rebuild on my Gen 2 S410 Carbine and here's the griff. I was seeking to solve inconsistency in pellet strikes and found this... The hammer was not running smoothly and polishing the rail and washing the hammer in thinners has fixed thi...

Hi, here I am , seeking brains to be picked...again. I've done a rebuild on my Gen 2 S410 Carbine and here's the griff. I was seeking to solve inconsistency in pellet strikes and found this... The hammer was not running smoothly and polishing the rail and washing the hammer in thinners has fixed thi...

The plot's thickened somewhat and a decision has been reached. My AA is a pre safety catch model and a mate and I did a bit of testing. I had my mate shoot five pellets into a target at 17 yards, resting the gun on a post. Then, he shot twenty more pellets, ten from each magazine. The results were e...

Well, thank you gents, suggestions taken on board. It occurred to me that if the bolt action isn't smooth, it could be one of two things. Either the mag isn't indexing correctly, making for a foul between the probe and the mag. Or, because the cocked position takes a big pull to find, the hammer/rai...