Changing Stocks

In 2014 I started a project with a Remington 700 SPS in 7mm Remington Magnum. This was a pawn shop find that was going to be a long range rig. The SPS models are the base level guns produced by Remington with the lowest quality stocks available.

I have had these stocks become hot enough to become very soft, to the point that it feels tacky as if it is going to melt.

The first thing I did was buy a Bobby Hart laminated stock, and a Wyatt’s magazine system. Then I spent Fourth Of July 2014 watching River Monster marathon, and fitting the bottom metal for the magazine system into the new stock.

At the end of 2014 I sold a large portion of my collection to clean up some debt. The 7mm was part of that sell off, but the stock and magazine system stayed.

Fast forward to this project. The first thing I did when I walked in the door with the .300 was to set the box down, and take the dogs for a walk, then start cooking dinner. But after all that was done I stripped the factory stock off and tried the Bobby Hart out for size, and it work just fine. Though I did decide to leave the Bell & Carlson on it for the time being.

I also mounted the magazine system.

After a couple of month of use the magazine system was not working out. The magazine would drop down a fraction of an inch and cause feeding problems, most often the round would nose dive into the receiver just below the chamber.

As I have been writing this I also have been studying Wyatt’s website and have found this is a common occurrence if the front pillar is too long, which would just need to be sanded, or ground slightly to fit properly.

Unfortunately both the B&C, and the Bobby Hart stocks have a full aluminum bedding blocks, which will require some serious work to bring them into the needed tolerances to work with the magazine system, which means that it is back to the factory installed magazine, and floorplate.

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With this decision I also reinstalled the the Bobby Hart stock, and did the dollar bill test, and it failed.

The dollar bill test is a simple way to see if the barrel touches the stock at any point, and even though the bill did slide the whole length of the barrel it was dragging the entire time. This is easily fixed buy some judicious sanding of the stocks barrel channel. 

I will have this completed the next time I am home. 

For some reason this post has taken quite some time to create even though it was pretty straight forward. Maybe too much going on, and not being especially creative was working against me this time.

09/26/2016 The Corbin Ky Love’s Truck Stop.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Results

I made it out to the range a couple of weeks ago, and overall the results were mixed.

 First thing I did was fired the last 5 rounds of factory Norma ammunition. This was to to rezero the scope after having the new lower rings mounted.  The processes went very fast which was very surprising because I expected the horizontal impact to be off. I expected it to be high because the original mount was about twice as high. Fortunately it was dead on as far as horizontal impact was concerned.

 The vertical position was about 2 full mills to the right. Or about 18-20 inches. I made the necessary adjustments, then took my next shot. that one was also still off the red stickie bullseye but only buy a couple of inches the third and fourth rounds were in the red.

 I suspect the scope being that far off to the right had something to do with the fact that I did drop it on the windage knob not once but twice when I was mounting it.

 On to the first load.

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 This is load number 38, and as you can see I was making a nice group but shot number 3 was pulled from me flenching because of the recoil, I was still able to finish the last two shots with a group at slightly larger than an inch. I went ahead and made 10 more rounds of this load for further experimentation.

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 Load number 39 did not fare too well. If I was a gun magazine writer I would explain how this is a perfect group for the intended use. If my intended use was to miss the target I guess I could be happy with this group also. The group was shot number 11-15 for the day and I was starting to become a little twitchy, so the poor showing of this load may be due to my sissiness.

On this day I did not try load number 40, it would of been a waste of money. 

 At the end of this session I was at shot number 50 for the rifle. My plan will be to run it until shot number 100 then clean the bore of all the copper fouling. This will allow me to start building my fouling chart to learn where the fouling equilibrium is. More on this in a dedicated post.

  The next trip to the range will also include the much anticipated muzzle break. If it works as planned I will be sending some heavy metal down range soon.

  Too be continued. 

PS another development.

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The New Dies.

In my last post I mentioned that the dies for this project have been acquired. They are manufactured by Redding, and consist of a full length resizing die, a neck sizing die, and an adjustable setting die. 

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The first thing I needed to do was disassemble each die, then clean them. The manufacturer recommends a gun cleaning solvent, but I used a slightly different method, which consisted of hot water and Dawn dish detergent. After cleaning them I rinsed them with boiling water. The boiling water will rinse all the detergent. oil, and crud from the die. The temperature of the water will heat the steel high enough to evaporate the water preventing it from rusting.

 

Then it is necessary to apply a light coating of lube on the inner surface of the die to prevent rusting, and to make the sizing operation smooth. This lube should be the same as what will be used for the normal sizing operation.

Next the setup of the press.

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 The press I use for this project is a Lyman Crusher, which used to be called the Orange Crusher because it was painted Orange, but apparently some marketing genius decided that black would be a better choice. It probably saved them 2 cents a unit. 

 The neck sizing die was installed, and adjusted. This die, as the name implies, will only size the neck of the case. This allows a case to be as close to the dimensions of the chamber while still being able to be loaded and extracted from the chamber. Though this ”custom” size of brass will possibly not fit in some chambers.

 My rifle being a standard production model with the regular barrel will have a chamber cut to the larger side of the standard maximum/minimum size for the 300 RUM.

300 Remington Ultra Magnum Cartridge SAAMI Schematic

 Most all the factory ammunition produced will fit into almost all the guns made to the SAAMI designated dimensions.  The different size chambers from one barrel to the next, though very minor is a factor in accuracy of a given rifle. With the case being almost the same size as the chamber the bullet will be more aligned with the bore of the barrel, this adds to the potential accuracy of a firearm.

 When a person has a custom-made barrel installed one of the common practices is to have the barrel reamed to the minimum size of a given cartridge, and sometimes even to the point that only a certain bullet shape, and length will be usable. The rifle of this blog does not have a chamber cut in such a manner. Just about any factory round should feed, and function in it.

 The brass has already been fired in this rifle, by only neck sizing the case it will have a tighter fit, and aline the center of the bullet to the center of the bore more closely. After the neck sizing the case was primed, then charged with a powder load of 78.0 grains of IMR 4350. The next step was to seat a 175 grain Nosler Custom Competition bullet, using the bullet setting die that has a setting adjustment micrometer which allows the bullet to be set at a precis depth in the case neck.

 I chose to seat my bullet at a depth that allowed me to have an overall length of 3.555 inches. This is 0.045 of an inch from the maxinum length. It will allow the use of the magazine ether the original, or the aftermarket on that is currently being used.

  1. .300 Rum
  2. Case Norma once fired
  3. Primer Fedarel Large Rifle Magnum No. 215
  4. Powder IMR 4350 78.0 grains
  5. C.O.A.L 3.555 inchs
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.300 RUM loaded with Nosler Custom Compatition 175 grin match bullet.

 

Sorry for the slightly disjointed post, on to the results.

 

 

 

 

New Toys

07/31/2016

 I arrived home Saturday Night and sitting on the dining room table was a couple of boxes that I have been expecting for a while, and quite happy to finally have received.

 The first was a bag of 500 .308 caliber 175 grain bullets manufactured by Nosler ammunition company. They are part of the Nosler Custom Competition line of components and used in the company’s match grade cartridges, and sold with the normal ”Match Grade” price tag.

 Being that they are .308 diameter the number of different cartridges that can utilize these bullets is quite numerous. One of my goals is to have 10,000 put away for my retirement. Also in case that another run on ammunition, and components occur I will at lest have some items put back.

  This particular lot will be segregated for load development, and normal use. 

 

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Bucket O’ Bullets

 The second item was a 25 round box of of Nosler Brass in of course 300 RUM. These will also be put to the side for later use. 

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 The most important item is the reloading dies. Now I can start my load development which if I do my part, and if the rifle is mechanically capable I will be starting on my next leg of my journey for 1,500 yard hits.

 More to come shortly.

Ohio

Well the wife and I recently returned from visiting family, and friends in the kind of great state of Ohio. It would be much better if the dummies had not elected the bag of dog shit John Kasich Governor. But that is a rant for someplace else.

One of the things I wanted done was to have the muzzle of the rifle threaded for a muzzle break, and maybe at some point a silencer. 

 I had Dana Brownfield of D&D Shooting Supplies do the needed metal work. Though at this time the break has not been installed. The particular break that we decided would work best had to be ordered, and I decided to have Dana apply a light sand blasted finish to  give it a flat appearance. This will help with not spooking any game if at some point I decide to use this rifle for hunting.

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 Because I now live about 900 miles from the Dana’s shop he will be shipping it to me. This should not cause any issues as the break that we chose to use has port holes milled 360 degrees around its surface, this will eliminate any timing issues.  

 Had I gone with a break that exhaust to the side, having the port lined up perfectly would be very important. Because the ports are 360 degrees there will be no correct position thus eliminating any negative pull off during recoil that could occur with a break that was timed incorrectly.

 The disadvantage to this system is that the muzzle blast will kick up dirt, and stone throwing this debris into my face.

 Don’t worry ladies nothing in this world could ever harm my most lovely appearance.

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 I also purchased a set of low profile scope rings, a new set of sling swivels, a set of reloading dies, and some virgin brass for load development.

 The new mounts should go a long way in providing me with a much better cheek weld. Something I have been whining about since I started this project.

 Much more to come soon.

 07/26/2016 One Stop Travel Plaza Newburg, Maryland. 

Just sitting waiting for the repair truck to come and fix the problem that was supposed to have been fixed last week.

Scopes and mounts.

 Not much has been going on in the 300 RUM world these last few weeks. I have been on the road only getting home on the Fourth of July weekend then doing some local, and overnight runs. 

 Arriving home last night Susan and I started preparing for our trip back to Ohio to see family and friends. But I am most excited about the fact that I will be having a muzzle break installed on the RUM. 

 Yes I have been told my priorities can sometimes be misguided.

 Now to the topic of the title, as stated earlier the cheek wield on this rifle using the S.S.A.L.T mount from SWFA is not working at all. This is affecting my ability to maintain a solid follow through hold during recoil.

 A low mount will be installed later this week after the metal work is finished. And as of this morning the rifle is at the shop waiting to be started on.

As of this morning A set of Weaver 30mm rings have been added and the metal work should be starting. Hopefuly I will be able to get some video of the mill work. 

  More shortly.

 

5 Shot’s

 Monday, June 13 I went back to Gateway with the plan of shooting several rifles, but with the heat it was not going to happen. Though it was still a very productive day.

 First I fired two rounds over the chronograph to get a velocity reading. This is where I needed a camera filming.

 The chronograph was mounted on a regular camera tripod with the shaft that the chronograph mounts to extended up about half of its total length. After firing the first round the muzzle blast caused the shaft to retract to its lowest position. Annoying but funny. The second shot had to be taken from a less than conventional position but all worked out in the end.

The readings work out to an average of 3,144 FPS.

 My next problem was that my ballistic program would not allow me to update my load information, and instead kept the old load information from a .308 Winchester load. This made it necessary to do it the old fashioned way .

 The first round hit about 8” right, and 3” low at 200 yards. This was with a cold almost clean barrel. Only the third shot after cleaning it. The first two being when I was chronographing earlier. The adjustments made and I was ready to run my last 5 rounds for this rifle for the day.

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 Shooting from the prone position was fun. The recoil was definitely making itself known, but was not as harsh as it was while shooting off the bench. But with the scope mounted so high it makes good solid shots hard to achieve. I will be biting the bullet and ordering a new set of rings next week, and will have to start the process over again. 

 The process should go quickly because it has already been sighted in so the only adjustment will be the elevation.

 Until my next time at home it will be just working to pay for these expansive habits of mine.

 More to come.