I bought my son a Christenson arms Ridgeline in 6.5prc and topped it with a gen 1 vortex viper pst 6x24mil. He is shooting Hornady Match ammo in 147. We did the barrel break in and have it zeroed at 100 yards and its an absolute tack driver. We have downloaded the Hornady app and have extended our range out to 640 yards (that's the farthest we can shoot at our range) and he can ring the small plate with easy. I have Vortex range finder that is nothing fancy and I was wondering if a sig 2400ABS would be the next gadget I should buy or something along those lines. Our next challenge is going to learn how to read the wind. Its pretty fun watching this 14 year old kid shoot. I fear I will have to get into reloading or get another job to afford this 50-100 rounds every weekend habit he has.