It will give you muzzle velo, but might not give you 100 yd. velo.
It usually gives you several velos out to 100 or so yards. You can set the intervals.
I have had a LR for a few years. My suggestions would be to get the trigger with the magnet from JLK precision. And an external battery pack. LR sells one, but you can get one locally or online. I also use a small tripod, and set the unit next to my scope, so the muzzle blast from brakes doesn't hit the LR. I also have a sight from MK machining, that makes aiming very easy. There are other sights out there too.
This is my setup before I had the magnet adapter for the trigger- had to use a rubber band.
I bought my LR through MK machining also because they threw in the sight and a 10% coupon helps also. All Ive picked up with it is a small tripod now, so Im going to check out the trigger system. Do you find yourself using it at all times even when youre the only one shooting? I appreciate the info from you and the others. I feel much better about my purchase now.