I have owned/own both 338 WIn mag/340 wthby and currently own 2 300 mags. I wanted to hear from someone that has used both and can positively tell me what difference in killing power there is on Elk Sized game between a 300 win shooting a 200 grain bullet and a 338 shooting a 210-230 grain bullet. I am talking shots in the 100-300 yard range BTW