Two identical barrels...same mfg., same length, same twist...one chrome lined, the other plain jane. Difference in accuracy? I dunno. The consensus would be the non-chrome lined barrel would provide superior accuracy. Now, if I was building a match rifle or a 300 yd. prairie dog dispatcher, and looking for every edge I could get, I'd go with the unlined barrel. However, if I was building a GP rifle....maybe a little plinkin', little informal target, a couple of varmint hides on the barn door, I really don't think it matters. For most of us, "practical accuracy" is anything under 2 moa. Both chrome lined and unlined are certainly capable of that. I.D. what your need is, and base your choice on that. I can't be accused of excessive research on this subject, but most of what I have read states anywhere between 0 - and 3/4 moa difference. Not much impact out to 200 yards or so, IMO. Lots of other factors affecting accuracy aside from barrel lining. (I couldn't shoot well enough to prove a difference anyway.)