the issue with Larue is, it has the least amount of bearing surface holding the mount to the rail. The knife edge is just not enough for anything bigger than a 5.56, realistically. Sure people get away with it, but then again, people get away with a lot of stuff.
You want surface area. I was told of an Army Test involving the various mounts, this happened around the beginning of the year or just before SHOT Show. As it was told to me, and take it for what it's worth as second hand, the Larue failed on the ground. The winner of the test was the Alamo Four Star mount out of the ones tested. I believe they did a weight / stress test, or something to that effect, we are going back 6 + months here, and they were lifting with the mount and it (Larue) broke free pretty fast. Lack of bearing surface.
I have several Larue mounts and I find the vertical rings a pain, and you definitely have to loctite them or they loosen up. I had my S&B Short Dot in a Larue and it came loose twice so I ditched the Larue. If you watch the Magpul Precision Rifle video that talks about them on a bolt gun, the reason for the scope swap / monkey drill was to cover the fact the / a Larue mount was loose on one of the rifles from the day before. (not sure if they kept that part in the production video, I saw a pre-edit version) I would recommend tightening them down with the tool, but then you risk the gouging everyone complains about.
Most of today's rings don't need lapping, a $50 piece of steel stock is not gonna be better than a $100k CNC machine or even more expensive one. Today's tolerances are tight, Larue is no exception I would not lap any modern rings.
As I said I have at least 4 sets of Larue QD mounts, and use them when necessary. But there are better ones on the market if QD is the goal. Personally I want to torque my rings in anything designed for precision. If you are shooting inside 100 yards 90% of the time on a Man Sized target you'll never see a difference, so definitely get the Larue if you want the cool guy points. You can't deny he has a loyal and rabid following. But if it was on bigger, more precise rifle platform... I would look elsewhere, of course your mileage may vary.