Nikon has been stepping up its game with regard to rifle scopes and the M-233 BDC 600 3-12X42SF is no exception. This scope represents the top of the line as far as tactical rifle scopes from the optics company known for its lenses.
The M series of 223 rifle scopes is a little pricier than the P series, but the scope is packed with extra features and accessories including a lightweight mount that interfaces with a Picatinny rail system that includes a 20-MOA gradient to take advantage of long range shots. Unfortunately, the mount will not allow the use of backup iron sights in the normal sighting plane. Backup irons or a backup red dot or reflex sight can be mounted on a side rail if these are required for the rifle.
Because most rifle actions are not absolutely square, despite how they look to the naked eye, it is a good idea to lap the rings for this mount prior to installing the scope. This can be accomplished by a lapping bar and compound and not only will it make the scoped rifle more accurate; it will protect the body of the scope from ring marks. Although it is hard to argue with the price point that Nikon offers this scope, it would have been nice to have had this task performed at the factory.
Unlike the P series of scopes made for the 223/5.56 round, the M series includes actual lens covers, as opposed to the caps on a string, and a honeycomb KillFlash to prevent glare from the objective giving away the shooter’s position.
Speaking of the objective, the 42mm lens allows a lot of light into the scope, resulting in a crisp clear image for which Nikon is becoming famous. On the other end of the scope, the eyepiece is adjustable for quick focus and offers 4 inches of eye relief.
The tactical target style knobs for windage and elevation adjustments are built with Nikon’s patented Zero-Reset technology. When making a windage or elevation adjustment, the shooter needs only to twist and click to change ¼ MOA (Minute of Angle) with each positive click. The Zero-Reset capability means that after making any adjustments with regard to windage or elevation, you simply pull up on the caps and return them to the zero position, allowing for minute adjustments once you have your rifle sighted in.
As implied in its name, this scope has a built-in bullet drop compensator (BDC) calibrated for the 223 Remington or 5.56 NATO round using a 55 grain projectile with a polymer or ballistic tip. While that may be a popular chambering, many shooters prefer the 62 grain SS109 and for extreme range varmint hunters a 77-grain bullet to keep it stable in flight. That is no problem for this scope as Nikon offers a ballistic program called Spot-On that can be downloaded as an App. Just enter the information for your load of choice and Nikon will tell you how to change your settings with a minimal amount of fuss.
The lower half of the vertical reticle wire on this particular scope offers a series of circles that serve as aiming points at different known distances. The shooter superimposes the circle over a target and fires the rifle. This scope has five of these circles representing 100 yard markers with hash marks between them, representing 50 yard increments, allowing the shooter to reach out to 600 yards.
Combined with a side knob for parallax adjustment, the M-233 BDC 600 3-12X42SF is superb for squeezing the most accuracy out of the 5.56/223 round at long distance and should be a favorite for three-gun competitors, long range varmint hunters and even police marksmen.
BDC 600 Reticle: Developed specifically for the trajectory of the 0.223 Rem 5.56 NATO round with 55-grain polymer tip bullet, the new BDC 600 reticle offers shooters unique open circle aiming points and hash marks from 100 to 600 yards.
Ultra ClearCoat Optical System: Bright, sharp, incredibly flat sight picture and light transmission up to 92 percent.
Eye Box technology: Impressive four-times zoom range and four inches of constant, non-critical eye relief. A large ocular lens delivers a bright, high-resolution sight picture.
Zero-Reset Turrets: Simplify field adjustments–simply sight in at 100 yards as usual, then lift the adjustment knob, rotate to your “zero”, and re-engage.
Smooth Zoom Control: Magnification reference numbers are viewable from the shooters position.
Side Focus Parallax Adjustment
Quick Focus Eyepiece: This allows the shooter to bring the reticle into sharp focus quickly.
1/4 MOA Reticle Adjustments with easy-to use positive click adjustments to get you zeroed in quicker and maintain your setting even with recoil.
One-piece Main Body Tube: This tube construction reduces weight while maximizing strength and durability.
Enhanced Mount Ring Spacing: With enhanced ring mount spacing–hunters can mount the scope on virtually any rifle action regardless of caliber–including magnum-length actions.
M-223 Mount: Fits Picatinny rails found on most flattop ARs. Lightweight alloy construction with built-in 20-MOA incline to maximize elevation for extreme long range shooting.
ARD Removable Anti-Reflective Device: Eliminates objective lens glare.
Waterproof, Fogproof, Shockproof: Nitrogen-filled and O-ring sealed.
Full Lifetime Warranty
Reticle: BDC 600
Actual Magnification: 3 to 12x
Effective Objective Diameter: 42 millimeters
Exit Pupil: 14 to 3.5 millimeters
Eye Relief: 4 to 3.7 inches
Field of View at 100 yards: 33.6 to 8.4 feet
Tube Diameter: 1 inch / 25.4 millimeters
Objective Diameter: 49.3 millimeters / 1.94 inches
Eyepiece Objective Diameter: 44 millimeters / 1.73 inches
Length: 13.1 inches
Weight: 19.93 ounces
Adjustment Graduation: 1/4 MOA per one click
Maximum Internal Adjustment: 60 MOA
Parallax setting: 50 yards to infinity
Mounting Space: 2.28 inches (section A); 1.34 inches (section B); 2.13 inches (section C)
Long Range Precision Shooting with the NIKON M-223 BDC 600 8489
The Art of the Precision Rifle features nearly ten hours of actual live fire class instruction and a “how to” aspects of long range shooting, advanced techniques and formulas, military and law enforcement sniping, precision shooting gear, and the sniper mindset.
- Features nearly ten hours of actual live fire class instruction and additional instructional material on five DVDs
- Five discs, DVD-Video/NTSC, Total Running Time 593 min.
- Made in USA