yea, the 338 has pure of a push or shove than a snap- basically, if we talk factory loadings, about the heaviest you get get wit the 30cal magnums is 220 grains which requires at least 1/10 twist or better, if i remember the chart correctly- i do remember that 180 goes into a 13.25 twist, and the heavier you go , the faster twist required unless your bullet diameter goes up-even with the 338, you need a twist of 1/10 to reach the 300 grain ( but those are target slugs) - my 1/12 bar won't do it- however , with the 338 you START at 250 in various cofigurations- i'd rather have bullet weight down range than velocity anyday- however they discontinued what i consider the best bullet for the 338 long ago- the 275 grain speer- same powder charge, better s/d and b/c than the 250 , and 25 grains extra weight for only a few less fps- for "lighter" game, yea, your 30 cal /165/180 are the ticket( the rifles are somewhat lighter as well) but for the big stuff , the 338/275 is the way to go- and yes, it's tough for me to look on the 300 like nothing more than an '06 with longer legs too- with the '06 you just have to sneak a little closer- same deal with the 308- the way i view the 30 cals is this- closer with the 308, close with '06 and far away with the 300 mag