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have ANOTHER look at the 2nd chart....assuming magpie is somewhere around 4" of verticle vital area........projectile stays within the theoreticle 4" tube out to 275 yards....
I took into...

147753


care of www.huntingnut

asuming BC is indeed .467 and programme uses G1 data this will be about right
asumed 3130fps average
75grn
1.5''above bore is centre of scope
by pushing...

147752



COULDNT quite get what I wanted but when you run figures and have a 225yard zero...2" high at hundred is darn close to it...means you can point n shoot on magpie with XHAIR on centre of...

I will go and do some magic with figures and try to post what I mean...be clear as mud then.

so if half inch squares...all your 2nd group of six are in roughly an inch.....thats a dead plover/bunny/magpie at that distance....out to 400,its going to open out to 4" so still very good chance of...

bush hobbit here.
stop over thinking it.
extreme spread.....doesnt even factor into equation out to say 350 yards....if you go back to what was arguably the first NZ hunting book on longish range...