Speedygoss,
I have built 2 ARs in 6.5 Grendel and really like them. One has an 18" Satern barrel and the other is a 16" Alexander Arms. Adjustable gas blocks on both to help preserve the brass. The factory Hornady 123 grn Amax and SST's have worked well for me. I have reloaded with the 120 grn Nosler ballistic tip and had good success as well. As far as mags I have used the AA ones and the AR Stoner ones from Midway USA without any problems. So far I have taken two Coues and one javelina with the the 18". Check out www.65grendel.com for lots of good info. Hope this helps you get started!
