Thread: In search of accuracy

Help guys! So I recently bought an L461 Vixen .222 off Kimber here on the forum. All looks pretty good, although the barrel (obviously a replacement as no engraving from Sako factory) is fairly worn internally and the rifling seems very shallow compared to all other rifles I've owned.
I put a new scope on it on Saturday and sighted her in at 50metres. I then changed targets and tried to shoot groups... Wtf?! I've always been a good shot (head shots on bunnies and pukekos etc at around 100m) and shoot respectable groups with my 6.5x55 and .22, but this .222 appears to be 'rising' in its point of impact with each shot.
I've heard in the past that .222 flogs out barrels quickly, and the barrel did get very hot very quickly with only a few shots. Is this why the point of impact would rise with each shot???
I'll put a photo up later, but a 'group of four shots was almost spot on for windage but 2" + for elevation!