ive always said I don't fully trust mine (combro)
if my guns doing 12.3 and my chrono says its doing 11.3 then im foooked if cops test it.
I walk to my permissions so more chance of getting stopped by cops if they see a rifle slip on my shoulder, rather than it being in a car boot not visible and on show ..
and if theres more chance of just a quick chat with the cops then that automaticaly increases the chances of them possibly wanting to test it.
so I NEED , perhaps more than other people, to know 100% that my gun is legal.