Ed, Unfortunately the parker I am working on was made before the removeable wear wedge was added to the barrel lug. For the later models it used to be possible to buy inexpensive replacement wear wedges so shimming wasnt necessary. Im not sure if anyone sells them now.

I thought Galazan sold them a few years ago. If not, a good machinist/gunsmith can wittle one out pretty quickly.

Brent:
If you ever do need a replacement barrel wedge, Galazan still offers them for $36. But personally, I find it much easier to work on the bolt than the lump bite. No worries about heat that way. Just careful filing after welding on some metal.

Best, Kensal