I want to replace my 300 wby mag just not doing what i want it to. I hunt ELK and Mule in CO @ 8000 feet. My problem I need a caliber that will kill elk at 1000 all my shoots run 500 to 1000, most will be 700 and 800 tho. My buddy has a 7mm sendero ultra mag 180 berger @3150 on retumbo.gun) I would like to know what you guys think about that set up for elk at 1000 (2088fps/1742 energy @ 1000) reason I'm considering buyin one. But I'm torn with the 338 and say a 225 or 250 bullet. I dont think the 300 berger is for me been running the number jujst to much drop I believe. Any help will be fine. not looking to buy a full custome so gun I nee is something I can run out and buy and have alittle work done. Guns in my mind 338 or 7mm sendero ultra mag, AR30 338 lapu. My 300 wby is just not putting up the numbers 210 bergers @ 2750 best load. max speed so far 2850. When ran by the 7mm its way behind.