09-12-2013, 01:53 AM
Hopefully I'm not stating the obvious (I have no desire to be renamed "MOTO")…
A specific parallax setting (for those with adjustable parallax) is only good for a particular range (i.e. 100 yds, 200 yds, etc). My local precision marksmanship trainer has his students find parallax setting for each range at which we shoot. He uses the sandbag immobilization method with the "nodding head" to check for parallax. Students record this for each "data shoot" (first 3 lessons).
You can then select the proper parallax when you engage target at that particular range. Some scopes have sloppy "lash" in the parallax knob and must be adjusted from one direction (Leupold scopes are allegedly notorious for this). My SWFA, NF, and Viper PST don't care which direction the knob is turned from.
On the other hand, I shot my Grendel bolt at Boomershoot from 350-700 yards with a fixed parallax Viper PST scope (100 yds) and didn't have an issue hitting targets.
ETA: Most scopes with "ranges" scribed on the parallax knob are nowhere close...
A specific parallax setting (for those with adjustable parallax) is only good for a particular range (i.e. 100 yds, 200 yds, etc). My local precision marksmanship trainer has his students find parallax setting for each range at which we shoot. He uses the sandbag immobilization method with the "nodding head" to check for parallax. Students record this for each "data shoot" (first 3 lessons).
You can then select the proper parallax when you engage target at that particular range. Some scopes have sloppy "lash" in the parallax knob and must be adjusted from one direction (Leupold scopes are allegedly notorious for this). My SWFA, NF, and Viper PST don't care which direction the knob is turned from.
On the other hand, I shot my Grendel bolt at Boomershoot from 350-700 yards with a fixed parallax Viper PST scope (100 yds) and didn't have an issue hitting targets.
ETA: Most scopes with "ranges" scribed on the parallax knob are nowhere close...
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