I found this very interesting. I have a question regarding the possible causes and remedies for a problem I have with my No1 MkIII*.
It shoot's reasonably good groups; a 5 shot group is generally 2 MOA if I do my bit. However when shooting in service rifle competitions; I have found that the group will rise when the rifle is hot. So the second series of 10 shots will be higher than the first series. Obviously with varying time (for target patching) between the series means it's not always the same conditions. But it is a problem as I seem to end up in the white!
Is this a known issue and is there a remedy?
For info; I've been through a lot of work on this rifle to get the groups to spec.( initially it was shooting 12 MOA). It now has a new (old stock) barrel, and I fitted the wood starting from the rear and spending time checking the barrel is centred (it was down the left side originally) and relieving unwanted contact areas in the barrel channel. ( the wood was later BSA manufacture and had not been properly fitted). Also replaced the spring in the front pad and adjusted the nose cap fitting so it just touches the barrel at about 11 and 1 O'clock.bolt contact is even on the lugs. I have kept it stock bedding and have tried to get it right.
Just not sure if I'm missing something.