[Bart B.]

A few examples of what the pro's use to measure velocity and pressure for load development.

http://www.newlenoxordnance.com/univ...--barrels.html

http://www.youtube.com/watch?v=VmwkZKVDLzE

http://wisemanballistics.com/product/

http://www.drello.de/english/ballistic/receiver.html

http://www.ketmer.com/hsp/testing/index.htm

http://www.bsn.it/prodotti/modReir.php

Test barrels are made to strict SAAMI specs for chamber, bore and groove dimensions.