Re: Level
We have them on all our LR guns, some shooters feel they don't need them but I think it's just a nice piece of equipment that lets you just double check to make sure you're plumb. If your targets are larger then the slight variance you might get from not being plumb every shot might not show up. For shooting small groups or small steel targets at extended distances then that slight variation could lead to a miss or larger groups.
We've seen more shooters adding them to their guns at our local 1000 yard matches as the scores are getting higher and the gamble for the smaller, higher value targets are needed they are using a level to gain an increase in their scores and hits.
They aren't that much in the whole scheme of a build but you do have to set them up right. When the level shows level you have to make sure your scope tracks true up thru the distances you'll be shooting. Only way to ensure that is by using the level and shooting a target and increasing the elevation in your scope and making sure the bullets are tracking straight up a verticle line.
Don't get the ones that fasten to the scope base, get one that goes on the scope so you can rotate and true it up.
Good luck
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