No. Angry bear is right. The combro works as stated. The FX relies on a pulse and return which is why doppler radar is capable of reading speed at various distances.
Combro are generally not good on springers due to recoil and they are not designed for rim or centre fires.
If you want a potentially mor reliable solution then the LMBR range may be a better buy. It uses IR beams so is not so influenced like the sky screen types.
I dont feel the FX quiet has this nailed yet and if I bought doppler, it would be labradar as I shoot powder too.
In a battle of wits I refuse to engage with an unarmed person.
To one shot one kill, you need to seek the S. Kill only comes from Skill