I spent 8 years in the Military. It was broke in properly and cleaned after after every 30 rounds since then. 200 Total rounds through Barrel.
I had a muzzle Brake
installed so the crown is protected from damage. A q-tip does not stick
I seat the bullet so its just touching the lands. I used a match to blacken the tip and kept seating further out until I had a small ring on the tip of the bullet and then backed it out just a bit.
All cases are once fired winchester rounds with winchester primers. A cases were full length sized when I got them and are length checked with my LEE set and the chamfered inside and out.
If you see any flaws in my system please tell me. I only started reloading this year and am using advice from Local and internet sources. Except for the breaking in and cleaning of my rifle. I take great pride in that.