I'm working up a load/s for a 338 Win Mag - factory REM 700. Am pushing for as much velocity that is reasonably practicable. Powders being tested are RL-22/4831SC/7828/W760. With non-belted cartridges my first indications of increasing pressure was a bit of stiffness when opening the bolt. When pressures got really up there the ejector slot/hole shined up a bit but that hardly ever happened in years of shooting. With this rifle the first indication of pressure is the visible bright shiney extractor pin hole. Then when the bolt is opened it shines the case head a bit. There are no other indications of pressure. Expansion ahead of the belt is mic'd as ok. Primer is not filling out to the edge of the primer pocket. Though I can get it there. Any thoughts????? Just trying to get some experience here.