Author's posts

Aug 04

Silhouette Match Instructions.

Instructions and Rules Match Rules and Details at RFC NRA Silhouette Rules at NRA web site. NRA Silhouette Rulebook (link broken) downloadable from this site. NRA Silhouette Flier (link broken) (2013) downloadable from this site – coming soon. Overview Match #1 – NRA Standing – 40, 60, 77, & 100 Meters or Yards (traditional Smallbore …

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Aug 03

Derivation of Riflescope Parallax Equation

Derivation of Riflescope Parallax Equation Workbook Click the link below to open/download an Excel (xlsx) workbook that allows you to enter your scope’s values and visually observe on a graph the amount of parallax errors which might be incurred.  The workbook and calculations are derived from the article/post:  “Derivation of Riflescope Parallax Equation” by Michael …

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Jul 29

Aperture (Peep) Sights

Aperture Sights – Parallax Suppression with a Target Rifle Aperture Sight Article on peep sights and the suggestion that sight alignment, in the traditional sense, does not affect the point of aim.  A must-read for those that use peep sights or are debating irons versus optics. Authors:  Robert J. Burdge and Douglas A. Kerr, P.E. …

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