Rear sight and bullet impact

[suba]

Hey guys,


I'm wondering if anyone knows how far bullet impact moves in one compete revolution of windage in a premier sight. Maybe the answer is caliber related I don't know. My 454 plinking load is dead on, but my 4227 load shoots 1 1/2" to the left at 10 yards. Same boolit and grip seems to be the same. No flinching going on either. 


 I guess I could crank a half turn and let a few go, but maybe one of you know the answer according to hoyle. 


Thank you...

[Ken ONeill]

Depends upon caliber and load, distance to target, and barrel length. Adjust by no more than 1/4 turn increments. A full revolution will be a lot. Ten yards is close, obviously, so the sight adjustment will also subsequently need to be checked at a further distance, like 25 yards. A perfect windage zero @ 25 will normally be adequate out to about 100 yards. It will be a bit off to the side @ 50, then return at about 75-80, due to the Coraolis effect.

[suba]

Thanks Ken. I should have known the answer was like everything else. It depends. Thanks for the tip about sighting @25. I typically shot 800-1400 yards but haven't shot rifles in many years. The last time I did I took 2nd place in a 50BMG match and that's with working up a load only the day before.


Hand guns are another story. Just have my 5 1/2 454 and no real place to shoot now that's why 10 yards. Would love a 475 or 500 but a man has to know his financial limitations