Reply To: Why does the POI change with a Moderator on?

Forums Field Target Field Target Talk Why does the POI change with a Moderator on? Reply To: Why does the POI change with a Moderator on?

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fe7565
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“Kim”

One would make it a bit longer or shorter to dampen the harmonics so that the bullet would exit when the muzzle was either at the top or bottom of the vibration, thus increasing it’s precision.


I have heard this before.  But one would think it doesn’t matter where the muzzle is when the pellet leaves, as long as it is in the same place every shot (and ES is small).

If this is true then POI wander should be from inconsistent harmonic patterns,


I think this is very true. As long as the barrel is in the same position every time it vibrates during a shot when the pellet leaves the barrel the POI should be the same. But if you use a different pellet weight, or type, or air pressure left in the tank (unregulated) varies, the harmonics probably changes with each pellet weight. This may be purely academic, and may be the harmonics does not need to be dialed in with each different pellet weight/velocity combo because the effects are negligible. I suspect that the powder burner guys would know if they need to calibrate barrel harmonics to each and every bullet type they fire.