OK here's my stupid question

[Trapshooter12]

I practice in a valley that runs west at about 5200 ft Alt. I zero at two hundred yards, for the most part I shoot half minute groups.

When I go to Reno to shoot the matches there (Alt about 4500 roughly) The range faces north and I always have to move my zero a half minute left and when I get back home I have to move it a half minute right. My elevations stay pretty much true.

Anyone have any ideas what my problem might be.

 

[hlee]

Prevailing winds?

 

[Trapshooter12]

Mostly out of the south. Usually in Reno there is no wind during the sighter period.

With a south wind I should already be favoring left in Reno.

The only other thing. I shoot off of a Sage ridge for practice and in Reno it's a Berm that we shoot off of. I'm wondering if it could be an issue with the way I hold the Rifle at the two different places.

 

[WaltHer]

Just glad no one's said "coriolis effect" yet. Lol

 

[JoshcBoucher]

Not "coriolis", in Reno.

Just glad no one's said "coriolis effect" yet. Lol

It would be the "Casino affect". Otherwise, I have no idea why.

 

[WaltHer]

It would be the "Casino affect". Otherwise, I have no idea why.

Lmao