LewMed , I have been sitting using the 750 and was getting about 5% high like you , I will try standing and see if that helps ....
Yes , the Loadmaster took years to get right and then need fixing again here and there .. hoping that the 750 will stay good after fixed , it looks to be much better built and is much smoother... waiting on a new primer slide assembly from Dillon and will try your technique of standing ... Thanks for the advice