yep, they shoot wonderfully in my wifes SPS Tactical. Im using 25.2 H4895 lit by a Fed 205M in Rem brass OAL length 2.285. Running about 2950 out of a 20 inch barrel
I have shot quite a few Hornady 68's through two different 1/9 barreled AR's with excellent results from both of them. If I remember correctly one was a Wilson barrel and the other was a Bushmaster barrel.
Like everyone else is saying, yep they shoot fine in a 1-9. My RRA 16" likes them as much as the 69 SMK. I use 25 grains of Varget and what ever SR primer I have out at the time.