I pounded out some Lake City ammo I have and the unfired brass is 1.775 for the most part, I know 5.56 ammo is different than 223 because it's a little longer, anybody know the case specs for 5.56? Reason I ask is RL15 max load will not fit in 223 at 1.76, spills out, so I wonder if that max load of RL15 is for 5.56.