Other than 5 grains. How different are the two SMK bullits? Are they close enough out to say 600 yds that dope shouldn't vary much? I hardly ever shoot my .308 any more but I keep ammo ready if I need it as well as drop charts and such. I just bought several 168 AMAX's, 178 AMAX's and alot of 175 SMK's. I have had several boxes allready of 175 and 180 Smks to decide what .308 projectile my rifle prefers. I want the 175 Smk to be the best because of availibilty but whichever pill works the best is what she will shoot. I don't plan on just swapping up if thats what yall are thinking. Just wanting to know if any one here have tried BOTH of these pills. Thanks guys