<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Polygonal rifling prohibits the forensic firearms examiner from microscopically measuring the width of land and groove impressions because the lands and grooves have a rounded profile instead of a well-defined rectangular profile.</div></div>
http://en.wikipedia.org/wiki/Polygonal_rifling
True or bogus wiki crap?
http://en.wikipedia.org/wiki/Polygonal_rifling
True or bogus wiki crap?