Dude, I think it's safe to say when it comes to M-14 scope mounts (or most anything really), you are going to get what you pay for. Never heard of Western Magazine making scope mounts before, just cheap magazines that never worked right, sort of another USA magazine sort of deal. The only thing I've seen Leapers make is more cheap junk generally sold through Tapco, Cheaper than Dirt and other low quality dealers at gun shows.
You'd be a lot better off getting a reputable mount right from the get-go. Brookfield Precision Tool (if you can find one) is generally considered the best though A.R.M.S. is another good maker and Smith also makes a copy of the BPT mount.
Only catch is that these mounts are going to be a lot more expensive than the cheap junk a lot of places sell but personally, I've owned enough junk that I don't even look at that stuff anymore. If this makes me a snob, so be it but I've owned enough junk in the past that I've come to realize that I would have been money ahead if I bought the good quality stuff in the first place rather than waste the money on crap then have to spend more money on the good quality gear when I found out the cheap crap wasn't going to get the job done.