After a couple of weeks of paperwork and thumb twiddling the second hand Remington 700 finally arrived (many thanks to ACP Shooting, Sussex, UK).
I had been trawling the used ads online and found an ADL (basic model) for £350.
The rifle is well used but in satisfactory condition given the price. The barrel is very slim and looks almost comical next to a Varmint barrel. The bolt operates smoothly and trigger and safety were both thoroughly tested for reliability and safety. All good.

The next job before going to the range was to get some mounts for a scope. There are a number of considerations regarding mounts. The MDT HS3 accepts AR15 type buttstocks. Dependant on which you select you might end up with a fairly low cheek height to maintain good weld. Keeping things super low would be the order of the day. The rifle will become a .260Rem after a rebarrel. As the .260 has the ability to reach out into 300WM territory I figured a 20MOA cant on the rail would be a good idea. Of course budget plays a part as I am trying to keep this build as economical as possible whilst maintaining build quality and precision. After much searching I decided upon..

DNZ Gamereaper mounts.

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DNZ are an American company which have rapidly developed a good reputation. They manufacture precision scope mounts from blocks of top grade billet Aluminum. The result is a very light but incredibly strong mount.
The Gamereapers are rifle specific. They screw straight into the rifles factory threads which negates the need for a picatinny rail or any other extras between mount and rifle. This helps keep the weight down and more importantly for this build keeps the scope low.
The Gamereapers are a single piece mount which some say helps reduce torsion of the action. I am not sure about that but it certainly adds rigidity to the mounts themselves.

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The mount was easy to install – just screw them down and nip them up with a torque wrench (Wheeler Fat Wrench).
The rings are split horizontally which makes levelling and adjusting eye relief very easy. Once everything was in position just tighten down with the torque wrench again.

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I bought the 30mm, medium, 20MOA Gamereaper for the Remington short action in right hand. They are also available for a large number of other rifles and in different sizes. A Vortex Viper PST 6-24×50 sits nice and low with space to spare for the upcoming Trueflite .260Rem barrel.

Assembling the HS3, Magpul PRS Buttstock and AR grip.

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With the scope mounted it was time to sort the HS3 chassis out with a buttstock and grip. I had a PRS on the AR which is due to be swapped out. We are lightening the AR for the “AR on a diet” series of articles and it is due for a Magpul CTR. I figured the PRS would be ideal for the HS3 as it provides options for rear monopod or riding a rear bag. It also adds a little weight to the rear end to soak up a bit of recoil.
Removing the PRS is easy. Just undo the large screw visible at the rear and the whole thing slides off of the buffer tube. Then carefully unscrew the buffer tube. Remove the spring and buffer taking care not to lose the buffer retention pin. Then just screw the buffer tube onto the MDT HS3 chassis.

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The Magpul PRS just slides back on and screws into the buffer tube. It all locks up firmly with no wobble at all.

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The MDT HS3 accepts AR style grips but it will not accomodate the beaver tail types.. Only those with a flat top. I only had a beaver tail type and a hacksaw 😉 I just cut the beaver tail off square and it mounted with MDTs supplied allen head screw and washer. Easy.

The Range.

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Ok so now for the fun part. Today I took the Remington ADL in its standard wooden stock to Bisley along with the HS3 chassis. The plan was to shoot a couple of groups with the unmodified rifle and then swap out the stock for the HS3 chassis at the range. This would allow me to compare accuracy fairly between the two.

Testing Conditions.

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I met Raf (regular contributor and nice chap) at the 100yd range (Short Siberia). Weather was overcast but mild (50f) with little to no wind. Ideal. I ran two types of ammunition both from GGG. GGG currently provide the UK NRA with competition ammunition. Their 155g SMK “imperial” 7.62×51 is issued for TR comps while their 7.62×51 NATO is very popular with practical and service rifle comps.

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I began with the standard wooden stocked Remington ADL shooting benched off a bipod. The 7.62 NATO grouped horribly. In fact the term group didn’t suit at all, it was more like a scattering. The groups were about 10″ wide. Very dissapointing.

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Things improved slightly with the 155g Imperial which grouped at around 4″.. Still pretty awful. I was thinking the barrel may well have seen better days which is often the case with used rifles. I was not holding out much hope for the HS3 chassis to make any noticeable difference..

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Chassis Install.

This was the easiest install I have ever done. Just unscrew to allen head bolts either side of the trigger guard to remove from the old stock.

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Sit the action into the HS3 and hold together muzzle end down resting on something soft. You want the recoil lug to be seated properly. Then tighten down the two supplied screws (long rear and short front) to 65″lbs using the trusty Wheeler torque wrench and it was good to go.

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I dry fired the rifle a few times to get a feel for things. After a quick adjustment for butt length I felt pretty good. It was a lot more comfy for me (a lefty) than the standard wooden stock. The HS3 is ergonomically symetrical other than bolt and safety recesses so fine for right or left hand use. I am used to the PRS already so I felt right at home. I did not need to raise cheek height at all as the DNZ Gamereapers keep the eyepiece nice and low. So onto the final part of the test..

The HS3 actually suprised me. I was not expecting huge accuracy improvement but the NATO grouped around 3″. A MASSIVE improvement over the wooden stock..

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Next came the GGG Imperial which produced a group of about 1″. That is amazing stuff right? The chassis has turned a bad rifle into something that produces 1MOA accuracy. So far I am seriously impressed.

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Raf was kind enough to demonstrate the GnZ presicion rifle for us while I grabbed some video.

Next time we will be heading up to see Mik at Dolphin Gun. He will be fitting a Trueflite barrel on for us as the .308 becomes a .260Rem..

GnZ

Links.

ACP Shooting – www.acpshooting.co.uk

MDT (Modular Driven Technologies) – www.mdttac.ca

DNZ – www.dnzproducts.com

Magpul – www.magpul.com

Wheeler – www.wheelerengineering.com

Remington – www.remington.com

Vortex Optics – www.vortexoptics.com

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