The thread about youth calibers got me thinking about complete upper options for my ar 15. From what I have found online there is type 1 and type 2 for both the 6.5 grendel and the 6.8 spc. Is the factory ammo offerings made for type 1 only? And type 2 must be hand loaded for? Sounds like either caliber is great for deer out to 400 yards with not much difference one way or the other. Any suggestions on complete upper brand for either. I would be looking for something that shoots factory loads. Thanks for input!