Purdey single triggers, especially the 3 pull are very complicated. Not just anyone can work on them. Ken Eversull in LA knows Purdey single triggers and is recommended by David Trevallion who will not himself work on the triggers. Is the stock original or replacement? If a replacement the in letting had to be done perfectly for the trigger and automatic safety to function properly. The reason I know this is I had a similar problem once. There aren't too many people who are competent to work on a Purdey single trigger, so make sure you find someone who knows for sure what he's doing as I've been told there are many of these triggers which notoriously don't work well that have been mucked up beyond repair by gunsmiths that don't know what they are doing.
