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  1. R

    .204 BT angle and length

    I grabbed three bullets from a box, OA length for them is 17.15mm, 17.18mm and 17.25mm. The angle that I measured is 19* included angle. At 18* and 20* I thought I could see light on the edges of the protractor (sorry, I don't have an optical comparator), so if David says 18* IA he ought to...
  2. R

    Machine shop building question

    Shop walls I have had a completely different experience with steel barn siding used as an interior lining than that of 'bigngreen'. Ten years ago i built my shop with 6" wall studs, blown-in cellulose insulation (14" in the ceiling), 1/2" wafer board on the walls covered by Menards barn...
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