hi all. im just starting to reload and im loading some e tip 130grn for my 270 win. I made a dummy cartridge and I very carefully put it in my chamber and pushed it in with bolt now this should give the measurement to the lands, correct me if im wrong, now I take that measurement and subtract .050 inch. and that would be my measurement off the lands,or do I measure from the marks on the bullet up higher where the bullet first touches the lands any help would be great ty so much jody