Overall I'd say mosin, if anything for it's simplicity.

In an environment where men would have been expected to operate on their own without support for extended periods of time, there are just too many little things that can go wrong with the Enfield and can't be fixed in the field. With the Mosin you can take it all the way down to the barreled receiver using nothing more than the issued cleaning kit and tinker with it so you can get it back into action. Overall accuracy would have been in the same ballpark since in those days there just wasn't the body of knowledge that there is now to design purpose-built sniper rifles from scratch. As far as I know all they pretty much did was mount optics on a rifle taken right off the production line that just happened to show a better accuracy potential than others, while not really having an understanding of why that was. A purely accidental thing.
Information
Warning: This is a relatively older thread
This discussion is older than 360 days. Some information contained in it may no longer be current.