Of course, bullets don’t fly forever and every cartridge will exhibit significant bullet drop at some distance. With less bullet drop, less elevation adjustment is needed to dial your reticle back to your bullet’s point of impact. The significant difference in bullet drop between these cartridges can be attributed to their different muzzle velocities.įor the most part, faster muzzle velocities correspond to flatter trajectories and less bullet drop to a certain point. As shooting distances push beyond 500 yards, the bullet drop will increase for both cartridges and demand even greater range of adjustment from the elevation turret. 300 Winchester Magnum will drop only 37.6”, or a roughly 7.2 MOA adjustment. With the exact same bullet, barrel length, and zero, a rifle chambered in.
308 Winchester firing a 178 grain bullet out of a 24” barrel zeroed at 200 yards will drop 50.9” at 500 yards, roughly 9.7 MOA of elevation adjustment. Understanding how much drop you will encounter will depend on a number of factors, the primary factor being the cartridge. If you know your cartridge will have a significant amount of drop at the distance you intend to shoot, you will want enough adjustment in your elevation turret to compensate for that drop. The amount of adjustment in the elevation turret is particularly important when shooting at greater distances or when changing between supersonic and subsonic ammunition like one might do with a rifle chambered in the popular 300 BLK cartridge. So what does all this mean and why does it matter? If a riflescope has 100 MOA of elevation adjustment and is mounted to a 20 MOA base, you still only have 100 MOA of adjustment in the scope – you’ve just dropped the angle of the riflescope itself by 20 MOA to get more functional use out of the 100 MOA adjustment range in the scope. The number of clicks you get on your windage and elevation turrets will remain the same regardless of the scope base, rings, or optic accessories added to the rifle. There are a myriad of ways to tweak and optimize elevation adjustments on a rifle, but one thing that you can’t do is change the adjustment range of your riflescope. By changing the angle of the light, the reticle appears to shift up or down, giving the shooter room to adjust to the point of impact. Each click changes the angle in which light is being reflected by moving parts inside the scope. When dialing a turret, an audible and tactile click is made indicating that an adjustment has been made.
Adjustments on a riflescope are commonly made by turning or “dialing” a turret (the knob on top and side of your riflescope).
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