Re: base and ring height for 56mm scope
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: supersnake6</div><div class="ubbcode-body">just sold my tasco 3-9x40 and rings that came on my savage 10fcp i bought from dicks. bases are gonna go to. im going to buy a millet 4-16x56mm scope, would love to have the 6-25x56mm but to much low end mag for deer hunting. im wanting the egw 1 piece base and burris xtr rings.with the full 22" bull barrel on my gun im unsure if i need the 0moa or 20moa base and the xtr low-1/4" med-1/2" high-3/4" xhigh-1" rings.im wanting (please hold the laughter) a hunting gun from 20-150yrds and be able to learn long range shooting out to possibly 600-800yds. this will mostly be for hunting but cant afford to have 2 seperate guns right now.i want the scope as close to the barrel as possible so i dont run out of adjustment.thanks in advance for any help or insite </div></div>
Although you probably want to buy the base and rings together from the same place for expediency and to save on shipping, you need to do your own homework by learning how to measure for ring height yourself. It is easy to do, usually results in better fit, and eliminates reliance on other people's measurements.
Get the 20 MOA rail - better to have it and not need it than to need it and not have it. And if you develop enough skill and have a rifle accurate enough to group well at 1,000 yards you'll want a 20 MOA base anyway. Personally, if I wanted a one-piece base I would use a Seekins (aluminum) or Nightforce (steel) over an EGW, but those two do cost more. Better quality and finish comes at a price.
Read <span style="font-weight: bold"><span style="font-style: italic">palmik</span></span>'s excellent
<span style="font-weight: bold"><span style="font-style: italic">Ring Height Info - How to Measure Correctly</span></span> thread. It is a short and to-the-point tutorial on ring height measurement.
However, something that <span style="font-style: italic">palmik</span> did not mention is that there is no standardized method of measuring ring height. Some manufacturers' measure <span style="font-style: italic"><span style="font-weight: bold">from the top-of-the-base to the tube/ring centerline</span> (center of the scope tube)</span>. This is the most logical method because once you know the OAD (overall diameter) of the objective and the height of the front of the base (above the barrel) all you have to do is select a ring height that gives you proper clearance. <span style="font-style: italic">Examples</span> = Leupold (all), Seekins (all), USO (all), TPS (all).
Other manufacturers' measure <span style="font-style: italic"><span style="font-weight: bold">from the top-of-the-base to the bottom of the scope tube</span></span>. <span style="font-style: italic">This method requires an extra step - <span style="font-weight: bold">you have to add the distance between the bottom of the scope tube to the tube centerline to the manufacturer's specified height.</span></span>
<span style="font-weight: bold">Example:</span> You have a 30mm tube scope and the manufacturer's specification is .25000". Adding in the distance between the bottom-of the-tube to the tube centerline (15mm/.59055") yields an actual height to tube centerline of .84055" (probably rounded to .84000, or .840"). <span style="font-style: italic">Example</span> = Burris XTR.
So, always be sure of the ring manufacturer's method of ring height measurement before you buy rings. Some manufacturers' even measure their rings differently between different models of rings! Hope this helps.
Keith