I did get both screws out. They both have the same thread, but the remaining intact one seems to be a non-gun thread--because it has a allen socket head. Maybe the previous owner did the d/t himself and used a hardware screw thread size. That's ok by me.
If screw IS a firearms thread size, I'll accept your gracious offer, Tazman, thank you.
ATR, about that band around the barrel--what the heck is that all about? It must throw the barrel harmonics all to heck. Wouldn't be be better to take it off and free-float the barrel--maybe bed the action to make up for the loss of the front screw? IJS.
BTW, the trigger pull is awful. Gritty creep into a heavy, less-than-crisp release. I need to get in there and polish and moly lube, if nothing else.
Hope to shoot it tomorrow with 150gr spire-point J-words. (If I find that #%^&*! screw).