RE: accuracy of semi-auto?
I would say to forget the reduced recoil rounds, and just spend the $20.00 and get a Limbsaver recoil pad, it works so good, my grandpa's Winchester Model 70 Bolt-action 30-06 used to kick so darn hard, but with the Limbsaver, it's fun to shoot, and my grandpa was actually trying to shoot shotgun shells with it!
Reduced recoil rounds would work out to 150 yard just fine, but I don't see how it would be neccessary, just spend $20-$30 once, instead of spending $20 every time you buy a box of ammo, just to get the same effect.
I would look into getting a Remington 673, I have one in .308, and it'll shootsmaller than 1 inch groups at 100 yards all day long, as long as you keep the barrel clean.
Remington 673's are on sale almost everywhere is gun stores now, so you might find a good deal on one.
The Remington 673 is based on the Model 7, which is a great rifle.
The 673 may look ugly from the pictures, but if you see one in real up close, it looks nice, has a beautiful beechwood stock.