Scope mounting target blocks

Discussion in 'Gunsmithing Forum' started by Cat1870, Jul 25, 2012.

  1. Cat1870

    Cat1870 New Member

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    Hello All:
    Id like to mount my Lyman 438 scope on my Remington 521-T. To do that I will need to drill and tap the rifle.... My question is, how does one pick the correct base heights?
     
  2. hiwall

    hiwall Well-Known Member

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    I assume you mean to compensate for the barrel taper? Measure the barrel diameter at the two spots for the bases, subtract the smaller number from the larger. divide the result in half. That answer is the difference in base heights between the front and back bases
     

  3. Cat1870

    Cat1870 New Member

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    Oh...Yeah. That makes sense......;)
    Thanks