The 142 SMK with a 17-inch barrel competes closely with the 308 Winchester 175 SMK with a 22-inch barrel up to 1,000 yards.
The drops in MOA for each aiming point are provided for users who wish to develop their own handloads for use on firearms with a barrel of 16" or shorter, or for those who wish to deviate from the recommended zero distances. With the 6.5 Creedmoor Sierra 142 grain SMK, velocity increases as the barrel length shortens from 27 inches to 24 inches. The 2 MOA diamonds offer a balance of speed and versatility based on the unique performance of the 300 Blackout caliber. This BDC reticle is not limited to one or two specific bullets: a majority of commonly available ammunition will fall within the 2 MOA diamond aiming points. The reticle drops are based on an average of commonly available off-the-shelf subsonic and supersonic ammunition from a 16" barrel. The supersonic BDC (out to 600 yds.) has been merged with the subsonic BDC (out to 200 yds.) to provide one set of aiming points for both types of ammunition. It allows the user to instantly switch between supersonic and subsonic ammunition without having to re-zero the optic. The 300 blackout reticle with merged aiming points has been optimized for simplicity and efficiency. A program indicated I would have about 21 clicks at 300 yards.
Rated 5.00 out of 5 based on 2 customer ratings. The speed of sound is a variable thing that is affected by temperature, humidity, and barometric pressure. And innovative Nosler Supersonic Rifle Ammo for personal defense & hunting. Supersonic means the projectile breaks the sound barrier, which produces a mini sonic boom, or a sonic crack. Creedmoor vs 308 Winchester Ballistic Trajectory Comparison (Drop / Path & Drift. Programs can be adjusted for this ,but the best way is to actually fire at the yardages and note the adjustments. Sale 308 Winchester SUPERsonic 168 grain Hornady® ELD®-Match. In very simple terms, subsonic means the bullet is moving slower than the speed of sound. Most ballistic programs are calibrated for scopes being 1.5' above the bore. It will serve fine on my current budget on my hunting gun. The Nikon whose reticle I posted came in on a trade and is reliable, repeatable and tracks well. The resulting conversation showed him it can be highly effective with a little application of knowledge. This 4x32 BAC ACOG scope provides a dual-illuminated reticle using fiber optics and tritium for a bright aiming point in any light condition. B D C reticles will not be as accurate as using click adjustments. The OP asked about a 223 BDC’s ability to be utilized on a 308 SCAR inside 300yds.
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