QUOTE (tx4guns @ August 14th 2009 11:32 AM)

I'm assuming you mean a 6.5 Grendel? For big game, I'd suggest the 130gr Accubond or one of the heavier Barnes bullets. You want it to penetrate on an elk, and it should do the job well with a shot to the vitals. Olympic is coming out with a new 30 caliber AR-15 upper that is supposed to surpass 30-06 performance. You might give it a look.
I prefer a .338 Federal 225 grain Nosler. I have has good luck with Elk, Moose and Brown Bear. I use a Remington Mountain rifle, but I am old school. I do plan to build a 6.5. I would like to use Sabre 18 inch CMV barrel and bolt. AA has a less expensive Stainless Steel , like $200 less, so I am vacillating.