ok look i am brand spanking new to reloading and 338 lapua mag is the only gun im currently reloading. so i got the brass clean deprimed cleaned the priming holes the set the neck sizing die lubed the cases sized the 87.4 grains of h1000 took it to the seating die set it put the bullet in and it and blam sank right to the powder mic'd it at .339 inside the case mic'd the sizing die inside at .372 mic'd the out side neck of a factory round .369 ???????????????? im so lost any suggestions?