Took out for the first time today with a 6.5 cm. I shot 50 times. Note to self: make sure you activate it prior to shooting. I had issues with it capturing all the readings from all 5 distances. It would always get the first 2, but I never had it get more than 3. Is this an alignment issue? I'm gonna get a small round laser or something, I had trouble pointing it. It's hard to hit up and down and side to side. I read using a speed square but there's got to be fool proof way. I'm just guessing this is why it would not capture all the distance readings. Oh, this was at 100 yards also. I ordered the usb battery with it but it died just when I was going to see if it could capture a 25g 17 wsm bullet. So I'm gonna find a bigger one that will last longer. Any suggestions on a tried and true battery? I was impressed with it other wise. It did capture every shot it was spose to. I had I 5 shot group that had an sd of .2. Neat stuff.