I had a 1:7 made for a .222, and accuracy was no problem with light bullets, in fact it pretty much debunked the idea that you could over spin a bullet, as far as I was concerned. I made a pest of myself at the range cutting the chains which held the steel plates - one side of a link at a time - on demand - in calm condition - with Sierra 52 gr HPBTM. (They were my chains)
You may encounter a problem if you choose to use fast expanding bullets like SX's or Blitz's. I loaded up some 50 gr SX's, and although most did, occasionally one would not make it to the target. I must of been right near the limits of what those bullets could take and still maintain their intergrity. The phenomenon, as I recall, did not occur with 55 gr. bullets.
