I currently have three Winchester 100s, 308x2 and a 243, that I like and have found to be very reliable. In addition to these three, I have owned several others in 243, 284, and 308. I had nothing but trouble with the 100s in 284 due to failures to feed. I have found the 243 and 308 magazines to be mostly interchangeable, while the 284s were very magazine sensitive. I have read all sorts of bad things about the Winchester 100s, but other than the magazine issues with the 284s, I'm happy with the 243 and 308s. Just like with any semi-auto, you've got to keep it clean and rust free. I've heard about people having problems with rusted chambers, but that seems like an operator maintenance failure, not a fault of the design or materials. My Winchester 100s are 1.5 to 2.5 MOA rifles, not super accurate, but easily accurate enough for most hunting situations within 300+/- yards.
