Dialling for spin drift?

[AlanF]

Denis,

In my opinion, trying to allow for spin drift by canting your scope reticle is being too clever and asking for trouble. Better to just keep everything level/vertical, so much simpler to achieve and maintain. Then just wind a few clicks left at the longs as needed. I think DaveMc has a rule of thumb of a 1/8' click for every 100 after 500.

Alan

[bartman007]

My more simplistic approach is as follows:

1. Zero the rifle at 300 yards.

2. When you get back to 1000 yards wind left 1 MOA to compensate for the spin drift.

* For all other ranges in between, simply approximate this drift

In regards to elevation being slightly higher or lower, that is always relative to where you zeroed your rifle, and is affected by the amount and direction of the wind blowing at the time. I normally write down my elevations at a new range, so that when I go back I can be confident of getting a bull eye at least for the first sighter

[plumbs7]

Just a pic I had of my rifle in a pseco barrel vice . But it also show my very expensive bit of tie wire that I can move for spin drift the further I go back . With Moa it is just to hard to correct for SD on the fly ! With Milrads it's pretty easy . Something to think about with the upcoming PRS series .