Some say they are the same as the Sierra's in profile. I like them a lot. I haven't done any comarison between the two, ( don't think I'm a good enough shot to tell) but I will definatelly keep using them. Maybe Sierra will bring their price down. I'm sure they have lost lot's of buisness because of that.
I shot the 140's out of my 6.5x284, at 1k. No problems, cheap bullets that preform very good. I did notice accuracy differances between Nolsers and Sierras, but they are a very good bullet, price wise also.
I ran a couple of hundred of the 77 grain through one of my .223s and they shot really well.
I bought 2K of the .308, 155 grain and they don't shoot nearly as well out of my DPMS .308 as the Lapua Scenars do, but, I haven't tried them out of my bolt gun yet.