Saturday, April 9, 2016

Initial range report, Nikon Carbine scope

Range conditions:  Holy Bleeping WIND Batman! 

I'm talking cold wind.... frigid wind.... an unholy gale from the bowels of the north pole, sent down JUST to screw up the one single day I can make it to the range.  A steady but wildly shifting 'breeze' around 20 mph, with frequent treacherous gusts approaching 50 mph blowing from every direction possible except up a man's kilt.

Yea, a might bit whifty, one might say.

Desiring to sight in the AR with it's new Nikon optic, The Fat Man needed a plan.  A Plan..... A Plan.....

So, too much wind blows the little poodle popper bullet around like a politician on an issue. All over the place.   But... not so much at close range, where the wind has little time to work it's evil magic.  Knowing that, I turned to Nikon's on-line ballistic program.   There, after entering the chosen optic, the ammunition, the height-above-bore of the scope centerline, and the approximate curvature of the earth at the range, the free software gave me predicted points of impact.  Thus, setting my zero range as 200 yards, I could see the 25 YARD suggested POI for that round.  I did this for both 55 grain and 62 grain 5.56 rounds.

At the range, with 1256 clothespins holding my target paper to the 25 yard backstop, I set up on the bench using cement blocks to hold my rifle down, lest it blow away.  The target had 1" dots on it to serve as aiming points, with duplicate 1" stickers placed exactly 1.75" lower than the aiming point.  If the math was true, the rifle set to place it's group on the bottom dot would be dead on at 200 yards, and 1/4" low at 100 yards. 

Firing the first round, I sandbagged the rifle with the crosshairs on the bullet hole created.  Adjusting the scope accordingly, the next round was almost exactly on target. Within a few more rounds, I was making one wide hole on the lower predicted point of impact.

Moving to a 100 yard target held in place with wind resistant nuclear atom-o-glue and some magic profanity, I again fired groups using both 55 grain and 62 grain ammunition.  The groups, although VASTLY more spread out than the 25 yard target, did center as predicted.

Shooting at 100 yards was limited to only 20 rounds, a couple groups per type of ammunition. By that time, The Fat Man's fingers were numb, and his eyes heavily blurred from the cold wind.

Results?   I certainly didn't do the shoot-testing I desired, but the rig is roughly sighted in for sure.  On the agenda is firing at ranges from 25 yards to 300 yards.  The target turret adjustments want testing, as do the quick-disconnect mounts for return-to-zero.

Happy with the optic so far?  Yes, yes I am. It has the same clarity and and brilliance my other Nikon optics have, and it seems just the ticket for my aging eyes.

More range testing will happen, and also some Appleseed style targets for score.  Look to this blog for near future reports!


Curmudgeon said...

Glad you're happy with your Nikon.

I used to work at the gun counter at Cabela's. I always thought Nikon's glass was a little foggy. That's just my observation.

All that counts is that you're happy.

I'm a big Vortex fan though and IMHO the glass is much clearer on the Vortex.

Just my $.02.

Harry Heckathorn said...

I checked the nikon and the bushnell side by side. Have to agree that both are great scopes. I have the bushnells on my rifle, they were slightly clearer. Both are good scopes. Both will do the job and put lead on target. Just my observation.