Can cause more wear on the extractor. Other issues are;
1) the polymer coating. If you shoot allot in one session and the gun gets hot, the polymer can build up a bit and give you a sticky chamber. Generally not a problem at the range, but for classes this can be an issue especially with AR's in my experience.
2) Some of this ammo is "copper washed" steel core which has 2 issues; 1) some indoor ranges don't allow it, and 2) the copper "washing" is an extremely thin layer of copper, and could allow increased barrel wear.
For the average shooter probably no big deal; if your round count is high, could present more of a problem.
I personally haven't had any problems in Mini-14, AR w/chrome lined barrel, Taurus 24/7, Glock 19, Sig P250. I won't shoot it in my high-end SIGs.
Other opinions will be forthcoming I have no doubt!