Hello, I'm looking for some experience and or opinions on tuning a load for a new barrel. My first custom rifle will be done here shortly and i want to break it in properly, if there is really such a thing. It is chambered in 6.5-284, Lilja Tactical contour, 1-8" twist, built on a 1965 Winchester push feed action. I will be shooting the Berger 140 VLD hunting bullet. I plan on using Eric Steckers method to tune these bullets with varying seating depth but that requires a known maximum safe working pressure/powder charge. My question for you guys is it ok to look for that max load during break in? Cleaning between shots like you would normally break in a barrel. Or should I designate the first 20 rounds to low charge, break in only rounds? Thoughts, opinions, procedures? Thanks!