Jack,
The TMX that I have been shooting shoots 100% high with the comb lifted about a 1/4" above its normal position on the stock ...
The MX-2000/8 that I recently purchased shoots low with the beads stacked, I had to lift the comb 1/2 inch above the normal postion on the stock to get it to shoot 100% high ... Wilkinson did the barrel and it measures (Bore .742) with .035 restriction, on the grease sheet it shows a very dense pattern from 30, 35, and 40 yards ... WPT ... (YAC) ...