Like I said I wasnt going to have time to do the test on that scope because I was hurrying to work up a load for my daughters 243. She was shooting 70 gr smk's and I moved her up to 107 smks and did a quick ladder test around a "known accuracy load" albeit a short cut I did come out with what I think is a nice load.
HOWEVER. This was a very limited test because I didnt have very many samples to test. I got a MV from the magnetospeed with a SD of like 7.5 so ok pretty good. I put everything into the ballistics calculator and came up with a drop sheet. All current conditions etc. I wanted to test the round out to 300 but didnt have any left. I shot the remaining 6 that were .3 gr more powder. The calculator said the drop was .6 so I dialed it, also a vortex vyper, and it hit quite low. By measurement it would have needed about 1.0 to hit center.
The actual mv measured was like 2850 average and if I "trued" the MV It would drop it down to 2560. Now I know it was a different load at 300 but I couldnt imagine there being 4 tenths of a mil difference when the powder is only .3gr different. I think I have another defective scope or maybe my magneto speed is wrong. This will require more testing. Im going to bring both drop sheets to the long steel range tomorrow and we will see which one is closest for the time being.