As far as snowballing and spawn killing is concerned, the range really isn't the issue. Heck, for most intents and purposes, the DMR isn't much different in that regard.
The issue is how easy the weapon is to use in this role. This results from the way the reticle and bullet magnetism is set up, the shapes and sizes of hitboxes, the movement speed, the movement acceleration, and map lines of sight.
Is there a problem? I would argue there is, but reducing maximum range would be a very strange attempt at a solution.