Since I am new to this desktop shooting stuff I would like to ask a question. Why is there sooo many concerns on this forum regarding 7mm for elk? I have been killing elk since '89 with a 7mm. Since '98 I have used 160 game kings strickly. Bullet goes in, explodes, dead elk. Never had a bullet exit. My dad has pumped 8 220gr 300h&h holes clean through an elk before it fell. 2 years ago my bull took 2 game kings at 528yrds. First shot made it fell in its tracks, second in the neck, flat elk. My real world experience gives me full confidence to 500 with a 7mm. My effort to up the anty and reach out to 600yrds has me scared to try anything besides what I have proven to my self. The BC has room to improve in the game kings. I want a 175-180 bullet that is effective. All the concern about 7mm on elk.....is it bullets not causing adequate damage interally? Bullet perfomance on impact? Or is it desk jockys looking at numbers in print and making 'scientific' descisions? The only elk I ever wounded and never recover was 620 yrds shooting up hill and I figured the game kings BC lost too much energy, or bullet placement. Does anyone have real life experience killing elk with 175-180 7mm? What do the recovered bullets look like? I am trying to educate myself. Any input is appreciated.