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| < 16ga. Guns ~ altitude/choke/velocity |
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 Posted:
Mon Apr 30, 2007 9:20 am
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Member
Joined: 28 Oct 2005
Posts: 665
Location: Louisiana
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Some interesting information came my way recently:
For every 2500' increase in elevation, patterning results reveal patterns that indicate a change in density equivalent to a +.005 increase in choke constriction---e.g.your IC bored gun shoots Lt.Mod/Mod-------barrells bored Modified shoot I.Mod or Full, etc.
(the .005 reference is for 12 gauge---16's may perform as if they were slightly 'tighter' .006/7)
Additionally, average velocity increases 75fps for each 2500' increment above sea level. |
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Mon Apr 30, 2007 1:22 pm
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Member
Joined: 18 Oct 2004
Posts: 69
Location: Colorado High Country
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Alright! Just the excus.... er, reason I've been looking for. At 7800 feet elevation, I'm shooting full choke at skeet. No wonder I miss low 8 so often...
TerryS |
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