RE: weighing powder charges.
dead on
While I use to weigh charges I really do not anymore. I could really never prove that it made that much difference in a hunting rifle. I also shoot T7 and really do not mind the little bit of lost powder that occurs when cutting.
The two cicumstances that I would weigh charges are if I were shooting BH, (black gold) i certainly would/do - because it is so expensive - I try not to waist a grain. the circumstance might be if I were shooting a target rifle for accuracy and money - but then i would shoot greatly reduced loads.