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Alexander Arms 6.5 Grendel Overwatch
and Vortex Diamondback HP Optic


6.5 Grendel 

Earlier today, the door bell rang a few times and by the time I opened the front door, the UPS truck was driving off.  My new scope had arrived.  I decided on the Vortex Diamondback HP 4-16x42 optic.  For the time being, it is in a Burris P.E.P.R mount.  Should I find the mount wanting, I'll look at other options.  My bet is that it will do OK.

I broke out my scope ring lapping kit.  It took about 15 minutes, start to finish, to have the inner surfaces of the rings looking good.  Before I started lapping the rings, I marked both tops, one front and the other back, as well as left and right.  That way, I could ensure they went back together positioned the same way they were lapped after I cleaned the lapping compound from the rings.  The Burris install docs indicated 20 inch pounds for the ring screws and 65 inch pounds for the Picatinny rail fasteners.  I used my inch pound torque driver to snug all the hardware to spec after getting a nice reticle alignment between rifle and scope.


6.5 Grendel Overwatch and Vortex Diamondback HP - 1

The Diamondback HP is a hunting optic.  It should be a good addition to the Overwatch since I'm primarily looking at using this for hunting in Minnesota, both deer and varmint.  There will be some paper punching every now and then too (gotta keep in practice).  The HP has a detachable sunshade measuring 4" in length.  It screws on to the objective lens with ample thread engagement to make for a secure and solid extension. 


Vortex Diamondback HP closeup - 1

The HP version of the Diamondback comes with a few upgrades when compared to the regular Diamondback.  The optics have received the higher end coating treatment to ensure maximum light transfer and durability.  In addition to the coatings, extra-low dispersion (XD) glass is used to increase resolution and improve color fidelity.  As you can see in the above photo, the HP has a parallax adjustment (focus) mounted on the left side of the tube which is adjustable from 30 yards to infinity.  Another benefit of the HP model is the 4x zoom versus the 3x found on the basic Diamondback.

After establishing the zero for the rifle, both turrets can be re-indexed to zero before the caps are re-installed.  The HP uses a 1" tube built from a solid block of aircraft grade aluminum.  The rifle's weight will tip the scales by an additional 18 ounces plus the mount once it is on the rifle's Picatinny rail.


Vortex Diamondback HP 4-16x42 specifications

Summary of Diamondback HP Specifications

scope covers

Here is one I had to chuckle over since it wasn't worth getting upset about.  This was the scope cover, as delivered.  Anyone notice a problem?  I sent an e-mail on Saturday morning to Vortex Customer Service.  I included the above photo and explained my shiny new HP arrived this way.  Within an hour, I got a response....it was a very nice apology along with a status that a new scope cover had been put into the mail and was heading my way.  I've had some odd ball stuff happen but never seen one like this.  I expect it will be along shortly.  Every company can make a mistake....it's how they deal with it that shows the real makings of the company. 

Update:   It was the following Wednesday and a package with the replacement scope covers was waiting in the mailbox when I got home.  Of course, there was no cost to me.  It was a mistake but it was courteously and promptly resolved with a 30 second e-mail. 

Fast forward one day.....with my alarm clock set so I could get an early start for the gun range to beat the summer AZ heat, I was surprised with a flat tire once I got out of the house.   ARGH!  My Father's Day range trip was getting off to a so-so start.  I got the spare tire mounted and headed for the range.  After letting myself in, I saw that no one was at the rifle bay so I unloaded my gear and put a target at about 30 yards in preparation for getting the HP on paper.

It took 4 shots using Hornady factory loads, two at 30 yards and two more at 100 yards, and I was on the bull and ready to go.  Good thing it was just 4 shots on account of the box only had 4 cartridges left in it. 

After adjusting the ocular lens for my eyesight (hey, I don't have 20/20 vision), I had a nice clear reticle to put on the target.  The parallax adjustment was smooth, easily putting the 100 yard target out of focus as I ran the control from stop to stop.  It was time to see how another batch of my hand loads would do today.


More 6.5 Grendel Overwatch




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