Wobbly Webley again

For those curious, I am now convinced the webley mk6 is suffering from under travel of the cylinder to varying degrees on 5 of the chambers. With a good rest I shot these 11 shots (all I had left at that point in the day) and they seem to be landing into distinct points of impact for each chamber, it looks like the two rounds fired from each chamber are grouping together (except one). The two fired from the 'good' chamber are right on point of aim, so my theory is that each of the notches upon which the trigger locates on firing have worn out at different rates. Attachment 188824

Thats what forcing cones are for!

A good Mk VI Webley will lock up tight when the action is cycled and the trigger held to the rear. A small amount of 'rock' is OK (about 5 thou each side). Wear in revolver timing generally occurs more or less evenly over all chambers. The correct way to check timing is with a 'range rod' which is a brass rod carefully turned to be a nice sliding fit in the barrel. Cycle the action , holding the trigger to the rear and the rod should slide neatly into each chamber. Mark any dicky ones with a felt pen and then you can observe the shooting results between good and poor chambers. I do have some Mk VI parts. I should add that that type of group on a pistol target is not uncommon and is caused by 'heeling' or pushing with the heel of your hand as the trigger breaks. This is usually caused by tight gripping with whole hand (especially the little finger). The correct grip is between the two middle fingers and the meaty base of the thumb, firm but not vise-like.

Attachment 190377Attachment 190378Attachment 190379 @gundoc there is a bit of play when holding the trigger rearward as you say, but it seems to vary between chambers quite a bit. I had a good rest shooting that group and it was quite close range, I'm confident the dispersion is mainly due to the lock-up but I'd be happy to be wrong. There is a bit of wear on the ratchet, arm, and cylinder lock (unsure if these are the right terms) and I've tried to show these surfaces in the photos. I have previously tried to peen the ratchet as I've read about, but wasn't keen on going too hard with it.

Yes, it is a well-worn gun from the photos. The ratchet is fairly uneven and the cylinder stop is well worn. I do have some parts but it needs a bit of specialised work to bring right, especially on the ratchet, which would soak up a few hours. Is the gun worth rebuilding as a shooter or sell it to a collector and look around for a better example? There are always plenty in the auctions.