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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Rangefinder help
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<blockquote data-quote="LRNut" data-source="post: 1900855" data-attributes="member: 3230"><p>I have owned a bunch of rangefinders over the years. I had a Leica Geovid with the ballistics corrections. My observations:</p><p>1. This unit uses a lookup table and then corrects for atmospheric conditions; it does not use a true ballistics program</p><p>2. Glass and speed of RF are fantastic</p><p></p><p></p><p>I loved the BR7 when it came out, but it lacks the following:</p><p>1. Doesn't compensate for spin or aerodynamic jump</p><p>2. I don't think it comps for Coriolis but since it doesn't handle No1 I would be stunned if handled Coriolis</p><p>3. The wind settings are too coarse but I do like I how you can toggle them relatively quickly. But at 1000 yards, I am trying to be better than 5 or 10 mph...</p><p>4. Rangefinder is slow</p><p></p><p></p><p>The SIG2400 ABS is far better than the above:</p><p>1. Handles spin drift (I zero at 500 for elevation, then use a 200 zero with a horizontal offset so that spin drift is zero at 500).</p><p>2 Handles aero jump: you plug in a strong wind from left to right and you will have to a click of elevation; right to left you take it off.</p><p>3. Handles coriolis</p><p>4. Inputting data with the iPhone is pretty slick</p><p>5. It handles angles (hills) really well</p><p>6. Rangefinder always measures, but it is hard to hold steady. I range several times including objects around my target to ensure I have the correct range.</p><p></p><p>The bad:</p><p>1. Battery indicator will show 100% bars then die</p><p>2. The gun profile issue is real, but for heaven's sake, if you don't realize the elevation at 700 or 1000 or 1200 is not correct, you seriously haven't practiced that much. That said, if you look at the display on your iPhone, it will show the MV etc - showing you the profile. If hunting, just unselect all but the rifle you are using and you can't screw it up.</p><p>3. While you can choose a wind speed down to the nearest 1 mph, you almost have to use your iPhone. And that isn't flawless, because as you spin the wind direction with your finger and then sync, it is easy to touch the face of the phone and change the direction. Happened to me on Sat - but I knew a wind of 2 mph from 9 required more than .2 MOA at 894 yards - I had touched 12 o'clock just after syncing. Fixed it and shot.</p><p>4. I took the SIG to my Colorado place two weeks ago at 8500 feet. Shot an Edge at 822 yards; SIG said to come down 3/4 MOA from what would be normal in AZ. Fully expected to hear a "doink" when I pulled the trigger. Nothing. Shot again; this time I hit the very top of the 20" plate. Came down another MOA and shot three more shots throughout the day in various wind conditions, all of them within 5" of center. Thought maybe my Edge had somehow shifted zero, but when I got back to AZ I shot it at 800 using 15.25 and E 1.5W and hit my 3" circle. So now I am wondering if the barometric pressure analyzer is working correctly. I will say in the past a 700 yard shot normally requires about 1 MOA less E, but going from memory. I will return in July and bring both RFs and two different rifles.</p><p>5. The SIG will heat up if left in the sun; you need to check the displayed temp vs what is real. Doesn't matter normally but at 1200 it might cause you to be 1/2 MOA high. Why anyone makes these in black is stupid.</p><p></p><p>Personally, I can't see buying any RF that doesn't have an advanced ballistics program. I don't want to have to look at a kestrel; I want the solution in my RF.</p><p></p><p>My next RF will be Trijicon's Ventus. Knowing the wind, if only to 500, will be huge.</p></blockquote><p></p>
[QUOTE="LRNut, post: 1900855, member: 3230"] I have owned a bunch of rangefinders over the years. I had a Leica Geovid with the ballistics corrections. My observations: 1. This unit uses a lookup table and then corrects for atmospheric conditions; it does not use a true ballistics program 2. Glass and speed of RF are fantastic I loved the BR7 when it came out, but it lacks the following: 1. Doesn't compensate for spin or aerodynamic jump 2. I don't think it comps for Coriolis but since it doesn't handle No1 I would be stunned if handled Coriolis 3. The wind settings are too coarse but I do like I how you can toggle them relatively quickly. But at 1000 yards, I am trying to be better than 5 or 10 mph... 4. Rangefinder is slow The SIG2400 ABS is far better than the above: 1. Handles spin drift (I zero at 500 for elevation, then use a 200 zero with a horizontal offset so that spin drift is zero at 500). 2 Handles aero jump: you plug in a strong wind from left to right and you will have to a click of elevation; right to left you take it off. 3. Handles coriolis 4. Inputting data with the iPhone is pretty slick 5. It handles angles (hills) really well 6. Rangefinder always measures, but it is hard to hold steady. I range several times including objects around my target to ensure I have the correct range. The bad: 1. Battery indicator will show 100% bars then die 2. The gun profile issue is real, but for heaven's sake, if you don't realize the elevation at 700 or 1000 or 1200 is not correct, you seriously haven't practiced that much. That said, if you look at the display on your iPhone, it will show the MV etc - showing you the profile. If hunting, just unselect all but the rifle you are using and you can't screw it up. 3. While you can choose a wind speed down to the nearest 1 mph, you almost have to use your iPhone. And that isn't flawless, because as you spin the wind direction with your finger and then sync, it is easy to touch the face of the phone and change the direction. Happened to me on Sat - but I knew a wind of 2 mph from 9 required more than .2 MOA at 894 yards - I had touched 12 o'clock just after syncing. Fixed it and shot. 4. I took the SIG to my Colorado place two weeks ago at 8500 feet. Shot an Edge at 822 yards; SIG said to come down 3/4 MOA from what would be normal in AZ. Fully expected to hear a "doink" when I pulled the trigger. Nothing. Shot again; this time I hit the very top of the 20" plate. Came down another MOA and shot three more shots throughout the day in various wind conditions, all of them within 5" of center. Thought maybe my Edge had somehow shifted zero, but when I got back to AZ I shot it at 800 using 15.25 and E 1.5W and hit my 3" circle. So now I am wondering if the barometric pressure analyzer is working correctly. I will say in the past a 700 yard shot normally requires about 1 MOA less E, but going from memory. I will return in July and bring both RFs and two different rifles. 5. The SIG will heat up if left in the sun; you need to check the displayed temp vs what is real. Doesn't matter normally but at 1200 it might cause you to be 1/2 MOA high. Why anyone makes these in black is stupid. Personally, I can't see buying any RF that doesn't have an advanced ballistics program. I don't want to have to look at a kestrel; I want the solution in my RF. My next RF will be Trijicon's Ventus. Knowing the wind, if only to 500, will be huge. [/QUOTE]
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