two reason... one, the 6.8 was designed for short barrels. That's not the real reason though. I shot a guy's carbine in .357 a while back and it had the handiest feel to it. This will make a really nice, short rifle. I'll put the youth stock on it and my wife/kids will be better able to use it. With the short barrel my youngest will be better balanced too. Just seems like the thing to do... Who can account for taste, eh?
ngh