Re: 338RUM or 338/300RUM in 28" tube?
Wiki,shows 338 LA=114 GR.338 rum=113,and Edge =110,h20. I think it is going to depend more on your barrel and build than the cartridge. I have seen Norma listed at 106,mine is 108 h2o. And I have noticed that compared to many Savage 338 la on this site I shoot same velocity with less powder,that is across Oehler.