your right Magnum Wheel Man, this thread really is old. But somethings are worth occasionally revisiting. Even more so with good pictures to look at.(like yours)
nice gun... I'm still trying to decide if I want to put a front sight on mine or not... it's obviously a belly gun, so it shouldn't "need" a front sight, but I have a couple screw in brass beads... I might have to put one on yet anyway ???
JN01, I have put 300 rounds of 340 grain WLN at 1,000 to 1,250 fps through it with the Sightmark in place, plus some other lighter target loads. No problems so far.