New Loads

I started the next part of eliminating possible causes of the horrible shot placement with removing the muzzle break. This was a little bit of an adventure. The shop down the street from my home was unable to remove the break due to having broken the tool they normally would use for a break like the one I currently am using.

This left me to take care of it myself, and when I am left to my own devices things can become expensive.

With this in mind I grab a pair of channel locks,  (it is strange that a single tool can be referred to as a pair), and twisted on the break until it broke loose. With this work done I remounted the SWFA 10x, and proceed to make some new loads using a different bullet.

I decided to try the 168 grain Hornady hollow point boat tail match, this is a round that I have had a lot of successes with, and the fact that it is the only other .308 bullet that I currently have in inventory also played a major role in this decision.

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With the break removed the 175 grain Nosler load still did not perform. The first two rounds were used to adjust the scope, with the third round landing two inches below the bullseye I left the adjustment alone for the next two shots in an effort to create a decent group.

That turned out to be a failure.

Load number 42, and 43 both were made with IMR 4350, wear as load number 44 used Reloader 22. All three have shown great potential, and will  be continued to be tested.

First was load 44, that produced a sub 1 inch group with a flier about two inches above the est of the group. I will take the blame for this as I was already becoming a little twitchy because of the recoil.

Load 42, after a scope adjustment, had two shots touching, with shot three, and four producing a one hole group, then a low left flyer.

For the final five shots, four rounds produced two separate two round groups, that were slightly larger than an inch, with the fifth round also producing a low left flyer.

By the end of this round of testing I was done for the day, and went to the handgun range, to enjoy a revolver I don’t spend enough time shooting.

Conclusions.

The 175 grain Nosler Custom Competition seem not to work well for me,  lucky I only have about 3,200 left.

A muzzle break will be needed no matter what. I will most likely go with a model that ports the gasses to the sides allowing the rifle to move in a more level straight line.

I need to work with my Model 27 a little bit more.

01/12/2017

 

 

 

 

Rollis Throws A Hissy Fit.

One the challenges in developing a rifle system is finding an accurate load that is precise. This can be a little annoying, if not completely frustrating.

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The RUM, only having 100 rounds through it, is proving to have a lot of precision problems, though the accuracy is showing potential in so far as the rounds are landing near the center of the target. The group size is rather large, or lacking precision. With an end goal of striking targets at over a mile (1,760 yards), groups that are measured in sizes of multiple inches at only 100 yards will not cut it.

After voting I headed to the range with most of my firearms to enjoy them for maybe the last time. I started with the RUM using load number 41, the same that I had been working with for the last several outings. This load has shown some potential, and needing to have as much consistency as possible I decided to stick with it.

The first shot struck one inch left, and one inch low of the point of aim, this would be known as the cold shot with a dirty bore, also commonly known as a cold, dirty. This has been a common occurrence with this rifle. I allowed the rifle to cool  for 10 minutes. The next shot was at least two inches high, and left. Needless to say I was disappointed with the results.

So disappointed in fact that I fired off the remaining 18 rounds. Then I removed the scope, and bagged the rifle up in it’s case then placed it in the bed of the truck where the bad guns have to ride.

The most likely causes for this complete failure will most likely be one of the following.

  1. Scope
  2. Ammunition
  3. Muzzle Break
  4. Barrel

The first thing I did was remove the scope, and test it on the .308 Win. After only a couple sight in shots the rifle was smacking bullseye with it.

The scope, load, and rifle combination has been used on other occasions, and have proved to be both accurate, and precise.

This leaves me confident that the scope is still working fine.

The next item will be to remove the muzzle break,  and then fire 5 more rounds of load number 41 which I expect to perform poorly. Unless it is a simple case of the muzzle break not being compatible with this rifle, which as I have stated before would be a shame. But as with anything firearm related, even though on paper it should work well there is a good amount of voodoo involved in building an accurate rifle.

I will also be trying different brands, and weights of bullets. Sometimes something as simple as a change in bullet weight, or the slight change of the profile of the bullet can produce vastly different results.

The most worrisome possibility would be the need to replace the barrel.

Rifle barrels should be thought of in the same manner as a car tire, there is only so many miles a tire can travel until it is no longer capable of holding the road, and a barrel will only survive a certain number of rounds until the chamber, and rifling is worn beyond its useful life. Some competitors will have to change a barrel out after only 1,200-1,500 rounds in the faster calibers. My hope is to be able to run this barrel at least 3,000 rounds before having to replace it. 

 Having a new barrel mounted would not be very difficult, but the price of even a lower end custom barrel, and the gun smithing it involves would almost be the same as the cost of the rifle itself. and even though at some point in time it will happen I really don’t want it to be in the first year with only 120 rounds down the tube.

 More later. 12/04/2016 Orange Park, Florida. 

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.