Congratz on the 6.8SPC. I own several including a 18" Bison Armory,a 10.5" AR pistol,and a Ruger Mini-14 chambered in 6.8SPC. The Bison has a 6.8SPCII chamber.
My application for these guns is hunting deer,hogs at night with my thermal,and stalking/calling hogs and coyotes during the daylight hours.
My 18" has the thermal because I want the added vels because we see quite a few coyotes while night hunting the peanut fields for hogs. Bullet for this gun is a 85gr Barnes TSX at almost 3100fps.
I shoot a Hornady 120gr SST in the 10.5" and 115gr Federal Fusion out of the Mini.
The 6.8 is a great chambering. It is just about middle road between the 5.56X45 and 308Win,depending on how it is loaded. There are some great bullets for it that fall between 85gr and 130gr. A good selection of "no lead" bullets from Barnes and hornady. Also from Cutting Edge but they are somewhat expensive.
Scan the web for sales on loaded ammo. Seller & Bellot drops down to <$12 per box every now and then. The brass is excellent and while shooting the ammo you can break in your gun and get your optics somewhat close to zero.
WES has a 6.8 package deal on here a couple weeks ago. It consisted of bullets and brass. Take a look. --- SAWMAN