Thanks Daryl, I'll try that. I remembered, once the lock was removed for cleaning, that the tang screw, which had originally been a wood screw had worked loose. I had previously glued in a piece of dowel rod and redrilled the pilot hole, but it worked loose again.
I did notice that the original intent of the maker was to install a through bolt into the trigger plate, but he missed. So, I inlet a small square nut into the stock, above the triggerplate, for an, almost, through bolt. I'm sure that the increased pressure on the tang had something to do with my poor performance, though not everything to do with my poor performance.
I also found, long after I had received this rifle, that the tang inlet was too deep, so a bit of Microbed, I think, was used to fill that dead space, so I might have to add or remove a little bedding to equal the original height of the tang.
Gotta spend an afternoon on the range to figure out what changed, and what needs to be corrected to restore accuracy.
What I really need is to do is get off my butt and build a piece that I have confidence in.
God bless