bentaz wrote:Whats involved in doing that mate, is it hard to do properly?
Push a patch into the bore just ahead of the throat.
Then I cut a piece of plastic strip about 10mm wide and 50mm long. Roll it up and drop it into the bolt lug recess where it springs out to prevent filling the recess with any casting alloy. Then heat up some chamber casting alloy from Northern Smelters - I use an empty fish can and a propane torch. It melts at some ridiculous temperature like 70C, then pour it into the chamber. Give it a minute to set, then tap it out with a rod from the muzzle - dead easy and takes all of five minutes to do.