There may be some inaccuracies or variations from the prescribed procedure,with the procedures for testing stated above.
It was stated that the muzzle could be pointed up or down, just be consistent. That is not how it to be done; the muzzle is to always be level. The tipping is not to be done, at least that is what I was told and may have read. It tipping the muzzle prior to testing each round is allowed, Please state that as "official."
The testing, as noted in the rules is to be the average of three of the four fired rounds. At least two must register to be averaged.
The bullet is to be weighed after being pulled; the shooter's statement of the bullet weight is not acceptable.
One big potential problem is the angle of the bullet path. If the bullet path is not exactly perpendicular to the both sensors, the distance traveled is farther than the distance between the sensors, and the velocities will be lower than expected. This may be difficult to achieve without using a laser boresight device to see that the setup is actually true.
Chronography is not as simple as any of us would like!
I, for one would like some of the statements clarified, and corrections made to my statements as necessary.
Thanks