Rifle mounted laser rangefinder?

The range finder came today. I only had an hour or so to play with it. So my opionon(s) may change ( good or bad) after I get some real time with it, I will update. First off, it is made pretty well. A lot more staunch than I expected. Instructions: basic push button on/off, angle (arc for bow hunting), speed (moving object), yardage fixed and auto ranging. It also confinsates for foggy weather. A handheld rangefinder it’s not. The open sights on the top will locate deer size game ok, but anything smaller or in cover and it’s all over the place. But, alined up with the scope, it’s a different matter. Again, instructions for alining it up with the scope, there aren’t any! It only took a few minutes to figure it out. I put it on my .25 Marauder as I already had a Pic rail on the top of the scope for a night lite. I am sighted in at 50 yards, so that is where I set the rangefinder for. I used my Loupold rangefinder to Mark 50 yards and set a box with target out. Knowing the target was at 50 yards even, I adjusted the up/down dial on the new rangefinder so it too showed 50 yards while I had the rifle’s scope centered on the target. I didn’t have to touch the left or right adjustments at all. It’s not hard to adjust for Left or right. But I won’t get in to that now. I had my son put Coke cans around the yard at different ranges. I also put out 8 cans from 10 to 80 yards every 10 yards. The new rangefinder was within 1 yard of my Loupold. It was off a couple times by 2 yards. But I believe it’s because the new one only measures to the nearest yard. While the Loupold measures to the tenth. + or - a couple yards ain’t bad in my book. If it keeps working like it did right off the bat, I will be ordering another one for the Disco. I do have one gripe already. The battery is a CR2. After only 20 min of playing, I was at 2/3 battery. I am hoping it’s just a crap battery. If you want more info, or have questions, let me know. 
 
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Sorry, my bad. That code is for select sellers only, usually U.S. based retailers. Did not see this range finder listed by them.

(FYI: you can sign up with Ebay for special offers/rebates and get once or twice a week on average 5-10% off. But that one is for your account only and cannot share it.)

For now, here is one for $116, and you can submit an offer for lower price. Normally around $123-128 but at times they go down to $112. The seller(s) are not very generous with going down on offers.


https://www.ebay.com/itm/Mini-Laser-Hunting-Range-Finder-Tactical-Rifle-Scope-Distance-Speed-Meter-700M/282896554572?epid=3004730075&hash=item41ddf2da4c:g:AwkAAOSwM99as0QS
 
Received my Rifle mounted Laser rangefinder and installed it this morning. Aligned it to the scope, which took about 15 minutes. For both the elevation and windage there are no arrows showing which direction is up/down or left/right. Not that hard to figure out. Will report more after I take it hunting in a few weeks. Photos below. Very light weight and easy to securely mount on picatinny rail. Remote button comes with Velcro. Default mode is continuous scan. Had to change meters to yards.

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1522523447_9918842605abfdd37018e11.63717461_67DB8AAD-4C2F-4137-969B-C89E65B6CB5D.jpeg

 
I returned the one I ordered on 3/12. I worked with it a couple of times to get it aligned with the reticle on my scope but when I went to the range yesterday it wasn't quite tuned in. When I switched to different targets from 40 - 100 yards it wasn't nearly as effective as my hand held. The video by Steve Allen shows him seeing the laser flashing at night while using his infrared light. I don't have one, so.......Its easy to see where you are pointing a hand held so I'll keep using it.
 
I still assume for those such as myself shooting further than 115 yards this would not be ideal. I use turrets to move my crosshairs and that would make my rangefinder no longer on target... like at all. Out past 100 there is a decent amount of scope drop compensation to take into consideration. Just as skohl noted. Still have it in my cart on both Ebay and Amazon but something tells me it won't work for my situation...
 
I’ll let you know once I take it out. The rangefinder is aligned to the scope, not the rifle. Since light doesn’t bend (except near a black hole) I’d think it will be ok well out to 100 yards and beyond. The .22 Renegade I have it mounted to is good out to 90 yards plus, so we’ll see... My rifle is zero’d at 52 yards. 
 
Been playing with the scope mounted RF quite a bit and still not 100% sure I like/trust it. My side wheel on my scope is really close at estamating ranges which I verify with my handheld RF. I have my scope sighted in at 50 yards. Say there is a bird in a tree about 75 yards out, I adjust the side wheel and it reads close to 75 yards. But at longer yardage’s the wheel is hard to get a perfect reading. Doesn’t have the finer readings as say 0 to 50 yards do. Might be 70 yards or it might be 80 yards. But close. Then I read it using the scope mounted RF and it usealy reads about the same. It’s not like a good handheld. So I am happy with it until the next test. Here I take a box and tape a 8x11” paper target with 5 bullseyes on it. Place it at a measured 50 yards. If I turn my side wheel to 50 yards the bullseyes are clear. If I aim for 1 of the lower bullseyes, the scope mounted RF is almost always dead on. But if I aim at one of the upper bullseyes, my scope is still in focus and showing 50 yards, but the scope mounted RF may show 54 or 55 yards. The target is in the same place, same piece of paper, only difference is the the rifle’s muzzle is elevated just a couple inches. I have tested this at every 5 yards out to 50 and the results have been the same. Can’t understand why I get different ranges at the same target by just raising or lowering the muzzle by only a couple inches. It’s not like the RF is passing the box and hitting a different target that is nearer or farther away. By the way, I was at a gun show Saturday and there is a third version called Osprey. It’s the same unit. It comes in black and has a price of $299! Talked with the seller and the first thing he asked me was how much I spent on mine. So watch what you pay for one. As it warms up, I will try to do a little better job of exact distance testing. Darrell
 
I've read these do bullet angle drop compensation, which would explain why the difference COULD change with the raising or lowering of the muzzle, but at 50 yards you shouldn't be moving your muzzle much at all and definitely not enough to have such a profound difference in yardage with dots on a sheet less than 11" apart in elevation. Sounds like the unit is misbehaving or are you perhaps when you aim your rangefinder zero'd to your scope you may actually be hitting the dirt in front of the 50 yard target when aiming at the bottom dot and then actually hitting the 50 yard target whilst aiming at the upper dot???

https://gundigest.com/how-to/training/trajectory-angle-shooting-rifles
 
I used mine this past Friday on my .22 DS Renegade. I had aligned the Rangefinder to the scope a few weeks ago, and when I put it back on the pic rail above the scope it was still in alignment. It does a continuous scan for about 15 seconds when the button is pressed, so you can move the gun around and it will show various yardages that you aim the gun at. Was the same accuracy as my handheld laser rangefinder. However, still not sure if I really like it. It makes the gun "seem" top heavy (er), and the display is hard to see in the bright sunlight. It may be best for the shooting done like @Pelletpinger at night, or where you have lots and lots of shots one after the other like ratting at night. The jury is still out on this one...