Ive loaded about 8000 trouble free rounds of 230gr ball ammo with my 550b to this point. Recently, ive decided to try a new bullet type for a change. I picked up a case of 200gr flatpoint fmj ammo from montana gold. Do i need to adjust my bullet seating die, or can i just run the new bullet type through it? The importance of the OAL is making sure the bullet contacts the rifling at the proper place, correct? When i line the new bullet (cartridge) up with a 200gr gold dot and a 230gr winchester ranger hp, they appear almost identical in length. The 230gr LRN ive been shooting is slightly longer than these three (obviously). I would measure the length, but my digital calipers just took a crap, and i dont have a spare battery. I cant 'F anything up too bad if the OAL isnt perfect, can I?