If its for a 340wbymag, I might reconsider the burris. I tried burris on my 300RUM, and I need more eye relief for that gun. I stick with leupold. For guns like 270win or so, nothing wrong with burris but customer service sucks. Also the burris's don't have near the dynamic range for long range with target turrets. I think you have only 17MOA or so of range, so to ultilize alot of adjustment, the scope has to set just right in the rings. I had to buy the signature series rings with inserts to do this.