20moa or 40moa base?

20moa or 40moa base?

This is a discussion on 20moa or 40moa base? within the Optics forums, part of the Sniping Related category; I just picked up a Remington 40XB in 300 win mag. My intension is informal target shooting at 300 to 1000 yards. The rifle came ...

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  1. #1

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    20moa or 40moa base?

    I just picked up a Remington 40XB in 300 win mag. My intension is informal target shooting at 300 to 1000 yards. The rifle came with Leupold QRW 2 piece bases and I am going to replace them with a one piece rail at either 20moa or 40moa. I will be using a Leupold Mark 4 6.5-20X50 scope. Is 20moa going to get me out to 1000 yards? Is 40moa going to leave me with too little adjustment at the bottom end? Which base is better for my situation? I was also wondering if either base will give me a little more clearance between my barrel and the objective of my scope than I am getting with the Leupold bases. My current rings and bases don't give me enough clearance to use my flip up lens cover and I would rather not spring for higher rings if the base is going to raise the scope up a little.

    Emilio

  2. #2
    Senior Member Sniper_Beast's Avatar
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    300 win mag + 20 MOA base = 1000yds very comfortably

    A 40 MOA base will probably give you problems on the lower end

  3. #3

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    Thank you Sniper_beast. Do you know if a Nightforce 20 moa rail would give me any more clearance than my Leupold QRW bases?

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  5. #4
    Senior Member Sniper_Beast's Avatar
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    Well if your QRW is a flat base (I think they are :? ) then the 20 MOA base will give you less clearence between the barrel and bell of the scope. This is because the front end of the base is lower than the back so that when everything is mounted up the barrel points up in relation to the scope.

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