My Grendel Barrel is "Slow?"

[kmon]

When I was using a optical chrono, I got more reliable reading with it on overcast days and make sure you are shooting straight through it not angled.

[Zeneffect]

if given the choice between a magnetospeed and optical chrono, which would you choose? Im having a hate-hate relationship with my optical.

[A5BLASTER]

if given the choice between a magnetospeed and optical chrono, which would you choose? Im having a hate-hate relationship with my optical.

Magnetospeed hands down 100% of the time over a optical chronograph.