Well... this is interesting.
Finished up night shifts this morning, and rummaged around in the shop a bit. Made up a new small(er) boresighter target, put some fresh batteries in the rangefinder, and found a spot on the back yard fence where I could hang the target at what turned out to be right @ 27 yards.
Set the gun up on a tripod, and using the Arca rail on the KRG Bravo I was able to clamp it in and lock it down pointing at the target. Note to self: I need to find a way to do that with my F-class guns!
So... the first setup was the Origin actions, Proof CF .308 Win shouldered pre-fit, Burris XTRiii 5.5-30x, as that was the most recent combination that I'd taken to the range last weekend. The back of the stock on the Bravo sticks up just enough that it *almost* interferes with doing a boresight like this - makes it a little hard to tell if it's actually 'centered' properly. Anyway, the turrets were centered and zeroed from the last range trip. Looked down the bore and... pointing almost dead nuts center. Huh.
Took the Burris off, and put the Bushnell XRSii 4.5-30x on the gun. Got it pointing at the center of the target, and dialed it back and forth, then zeroed the windage turret. Ran it all the way left, then all the way right, then back to center. It's maybe 0.2 mil right of 'mechanical' zero.
Pulled the scope off, pulled the stock off, swapped the .308 Win barrel for the original Proof CF 6.5CM nutted pre-fit barrel, torqued it on to 75 ft-lbs, and put everything back together.
Started with the Burris again. Had to come about 1.5 mil right to line up. Also pointing 1.5-2 mil high, but I was less concerned about that. Then the Bushnell... maybe 1.4 mil right to get centered, off the same amount for elevation as the Burris.
Some days, with the right lighting/contrast I can get it just right on. Today was not one of those days. Given the level of fuzziness in the bore sighting method... I'd say both barrels were pointing the same place.
I've got maybe 25 rounds loaded for the 6.5 CM barrel at the moment, but plenty of prepped and primed brass. Maybe tonight or tomorrow morning I'll load a few more and head to the range and see how the 'physical' boresighting lines up with actual paper @ 100. Maybe box-test that Burris scope. *Something* was not acting right to begin with, on a couple consecutive occasions, which is what led me down this rabbit hole.
