I am just wanting some opinions on weather or not using a 150 grn bullet out of a 300 WSM in either the E-tip, TTSX, or GMX would be enough to take down a spike elk, my friend just got one and wants me to load some of those rounds up for him, i am thinking that since he has chosen 3 all copper bullets that he might be ok, but i am not sure so that is where you experts come into play. One more thing, is ther any certain powders that i should try with those 3 bullets that would maybe give the best accuracy as well as speed. Thanks