Guys I got the Hornady OAL gauge and bullet comparator. After measuring and coming up with the travel length to the lands I subtract .030 from that number. I then set up a dumby round to test for function in the weapon. I soon discovered that the length was too long for feeding into the magazine. I ended up having to subtract an additional .08 to get proper feeding into the Mag. How much will this effect accuracy and did I waste money on the gauge since it won't be as accurate. Secondly when preping my casings am I better to just neck size or FL? I have the Redding S-type match dies if that helps. I'm looking for the most accurate round that still functions. Any advice is appreciated.