My cousin has chambered 223WSSM and 22DTI, trying to get an automatic 22-250 but found both of those either troublesome or not capable of his expectations.
He now has 4 or 5 223AI's with barrels from 20-24" and loves them. He's not quite at his 22-250 goal but the coyotes don't know it.
I had a Kimber Montana chambered to 223AI and love it. Those who say they don't feed well or they don't gain much haven't messed with one. I'm getting 3570 fps with a 55 grain NBT in my 22" barrel and it feeds fine.
Even if speed isn't your goal, no case trimming is worth the chambering alone. I have an extra upper and a few parts laying around and might wind up building me too if the bat cave gets back to work.
Hey TRW if your cousin was wanting a. 22-250 in an AR he should just go to a 204R in an AR the ballistics are in the same ballpark.
