Definition of Mechanical Offset

The fact that you must zero your rifles and pistols is a result of the fact that you aim with sights or optics that are some distance above the center bore of your barrel. The spatial difference between the two is known as mechanical offset.

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By Miguel.GFZ

Semi-retired like Vito Corleone before the heart attack. Consiglieri to J.Kb and AWA. I lived in a Gun Control Paradise: It sucked and got people killed. I do believe that Freedom scares the political elites.

9 thoughts on “Learning mechanical offset the hard way”
  1. I don’t know what “PeerTube” is or if that’s the problem, but the video won’t play for me. I just get the spinny “buffering” circle forever.

    Might have something to do with my anti-tracking tools, but I’m not turning them off to watch a video. Rumble embedded videos work just fine without being able to track my web activities.

    Also, just a nit-pick. Mechanical offset isn’t “the” reason we have to zero our sights. It’s “a” reason. As you are well aware there are various other factors at play as well.

    Actually I wish it was the only factor. I’d love a gun that always shoots a specific distance below point of aim regardless of range. That makes for a much less complicated hold-over calculation than gravity does.

  2. I have a cousin who shot his truck. Lined up using the left side rail for support, aiming over the bed at something off on the right. FOOSH! (scoped black powder rifle) and when the smoke cleared there was a nice .50 cal divot out of the right-side rail.

    That happened in the mid-2000s, I think; the family still reminds him about it every Thanksgiving.

    1. Lots of business for body shops around here before hunting season. “Sighting in” the ole venison/elk getter across the hood or bed of the pick-up putting extra holes in the tin work.

  3. I’ve seen more that a few pickup truck with offset holes in them.
    I set my rifles up with a 50/200 zero which is 1.5 inches low at 25. Thats how I zero. Get my POI 1.5 inches low at 25 at the indoor range then fine tune it at the outdoor range. I’m usually never more than a few clicks off perfect at distance and it really saves ammo.
    For handguns I put the dust cover on the barricade. Never got in trouble for it and it’s the easiest way not to shoot the barricade which is an instant DQ.

Only one rule: Don't be a dick.

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