Still you see allot of semi autos in use such as the M-21 (a scoped and accurized version of the M-14) for use against close to medium ranged, fast moving targets. At these ranges nothing can compare to the consistency of a bolt gun. Today, with the improvement in optics, rifles and mounting equipment, snipers regularly make 1000 M + shots. When sniping at that close a range then 'tack driving' accuracy isn't as important as rapid fire capability, especially when engaging mobile infantry. The thing is, back it WWII the optics were not good enough to be of any use past say, 600 meters tops and most kills were between 150 to 300 Meters. Most Semi Autos can not compete with a bolt gun at those distances, there are a few but they are outrageously expensive as compared to a bolt action and will always lack the dependability. You are correct, a bolt gun is preferred when doing true precision shooting out to 1000 Meters and more. Please anyone feel free to tell me I'm talking nonsense if I am.

I was under the impression SLR's were not ideal for use by a sniper as they tend to affect the optics more and so need re-sighting quite often? I suppose the role of a sniper (chosing the correct target and avoiding detection) would eliminate the need for a SLR as close combat would be unecessary.