No-one picked up on this on the other thread, but I think it is deserving of its own: Years back at Bisley I came across a chap with a 6-groove 308 barrelled L8-type rifle, who swore it shot straight. The Canadians also did one for target shooting, I don't know how it performed. I assume OK. The "real" L8 rifles were, however, mince. Why the supposed difference?