All early sniper rifles were not what we would consider 'serious' sniper rifles today. What we consider 'designated marksmen' are what in the past was considered snipers. They were not the several KM shooting rifles we now have, and accuracy wise many modern hunting rifles out of the box shoot better or equal to some of the early snipers.
Based on what I've read about the subject, I'm pretty sure that actual trained "snipers" in WW1, WW2, and Korea operated on the same principles as modern "snipers". And Mosins, No. 4 T's, etc are actually capable of adequate accuracy to function as "serious" sniper rifles today (when was the L42A1 actually withdrawn from service?). A military sniper rifle has to be built to standards of toughness as opposed to just being a target rifle. While the SVT 40 sniper rifle was not the best of WW2 it also wasn't the worst and it did meet one real world requirement- it was designed to be easily manufactured in large enough quantities to meet any demand (as was the PU). I've noticed that in most of the bio's of snipers I've read, the hardware is hardly mentioned- I guess you simply used what was provided and had no alternative. Interestingly, Zaitsev actually specifically mentions the SVT 40 in his autobiography as being particularly useful in an engagement where he and a small band of snipers had to tackle a much larger attacking force of Germans- the semi-auto design allowed them to prevail.
milsurpo