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<Dave King> |
I've used and installed dozens of them and have always had results in the 15 to 20 MOA range. One thing to check is the front screws, I generally need to shorten the screws that attach the front of the base. As a check on tightness I only install and tighten one screw at a time then check the base for tightness, then loosen that screw and tighten another. This ensures that all screws are properly tightening and are not bottoming out. If the front screws aren't tightening properly you'll loose some elevation angle. | ||
<MontanaMarine> |
I put a Badger base on my rem700 and did get 20 MOA. But, I had to shorten the front screws slightly because they bottomed out on the bolt. You may be experiencing this and the front of your base is not tight against the receiver. MM | ||
<MOA> |
I shortened my front screw and the base is secured to the action properly. I'm using a starting load with a barnes 160 grain bullet to break in the rifle. Could my point of impact be abnormally low with this combination of a mild load and a very light bullet? | ||
<Dave King> |
Check the amount of available up and down on the scopes' elevation setting with a 100 yard zero. This could give you some idea as to the actual gain by using the Badger base. You must also account for the standard drop between muzzle and 100 yards and the distance between the bore and scope centerline. Figure your initial muzzle to 100 yards drop as 3" and the centerline to centerline distance as 1.5". The reason for the muzzle to 100 yards drop and the centerline to centerline measurements is that ANY Base will diminish by this amount. For example; if you have a 100 yard zero and you have 60 MOA up and 45 MOA down available on the scope you have a gain of 15 MOA, you must then add the 3" and 1.5" of apparent drop to the 15 MOA of advantage. You add the 4.5" (MOA) and the 15 MOA and get 19.5 MOA of advantage. The only good comparison would have been to evaluate the PRE-Badger 100 yard zero with the POST-Badger 100 yard zero on the scopes' settings (assuming you had a good NO-Angle base and a good 100 yard zero with that base). I've never encountered a 20MOA Badger base that was anything less than advertised, but rifle and mounting methods make it appear that there is a question every once in a while. The load velocity and bullet shouldn't make much difference is you are making a pre and post comparison. | ||
<MOA> |
I think I just figured it out. The scope is a Leupold Long Range Tactical model. The specs in Leupold's catalog state that it has 80 MOA adjustment for elevation. I went through the clicks from where I'm zeroed (3" high at 100 yds.) and there were about 15 inches worth of clicks in the down direction before I hit the end of adjustment. Then I went up from where I was zeroed and got about 65 inches worth of elevation (UP). So I've concluded that leupold sent out this scope not in the middle of its adjustment range (Like I'm used to) but 20 inches down in windage. Have others noticed this with their LRT's? The target knob reads 1 like the elevation knob is turned up one revolution, when I was at the top it was over. I guess I'm satisfied with 65 inches in up elevation. The rifle is a Sendero 338 ultra, this should get me out beyond 1200 yards shouldn't it? Thanks for any feedback.--MOA | ||
<Dave King> |
I've used a few of the LRTs and didn't check the centering upon receipt. I get mine through Premier Reticle with MilDots. A while back I called Leupold to ask about the centering and they (customer support) stated the all scopes except the Mark IV M3 are designed to be near center, 40 up and 40 down on an 80 MOA scope, the Mk IV M3 is 10 down and the rest up (I forget the actual up amount but it's considerable). 65 MOA up with a 3 MOA above 100 yard zero should get you quite a way out. I shoot the Sierra 300 grain Matchking through my 338 RUM and cab get to over 1800 yards with the 3.5 x 10 M1 Long Range Tactical I'm using (Badger Bases and Rings). If you're using a high BC bullet and good velocity you'll easily get to 1200 yards. My load sends the 300 grain at 2750 fps and it still has 1000 ft/lbs at very near 1700 yards. The Sierra posted BC is a little low for the bullet and I use .798 as the BC for my shooting. | ||
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