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300RUM

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Everything posted by 300RUM

  1. Higher magnification in a scope can be a double-edged sword. Higher magnification can help increase accurate shot placement at longer ranges. If you have difficulty holding the rifle perfectly still it can also degrade your shooting. As you keep making little Corrections the higher magnification will amplify the movement. For younger shooter I think I would make sure you had a 3 or 4 bottom end.
  2. Don't give up. There just are not that many things it could be. The process of elimination will beat it in the end. Another possibility that I have run into in addition to misaligned screw holes is a bent barrel. You could cut a pair of V blocks from wood and spin the barrel and action in them to get some idea. The true test is chucking it in a lathe. If it makes you feel any better you are not alone. I just re-barreled 2 of my rifles. The one I wanted to take deer hunting finds it necessary to shoot 2 MOA or more. Then, just to keep me interested it will do a series of 0.5 MOA groups. In this case I believe there may be something loose inside the scope that lets the reticle shift. The old barrel had a high round count and I thought it was going out because the groups had been growing but the new barrel is grouping well either. After the hunt I will swap a scope from another rifle and shoot to verify.
  3. 300RUM

    Clogged tips

    I have used SMKs in .223, .277, .284, & .30. There has always been a cavity behind the tip.
  4. There is a chance that the screw holes for the scope mount do not align with the center line of the bolt bore in the action. A way to describe this is if viewed from the top a long straight rod was placed in the action where the bolt goes and another was placed perfectly aligned over the scope mount screws that rod would project to the left or right of the one replacing the bolt. If this is the case the action can be zeroed off of its center line in a mill and the screw holes re-drilled and tapped from 6-48 to 8-40 removing the misalignment in the process.
  5. 300RUM

    Bolt Fluting

    I can straight flute my own but spiral fluting is a little out of my league. I recently wanted one spiral fluted and had axis works to it. Eric does real nice work.
  6. Shortening a barrel will not result in a loss of accuracy from a mechanical standpoint within the firearm. A shorter barrel will often result in degraded ballistic performance in relation to a longer barrel. But how much? As long as you can accurately calculate the drop, windage and other ballistic components and dial your scope correctly you have the potential to be accurate. What if the wind velocity is shifting? What if your range is a little off? With higher velocity resulting in a flatter trajectory and less wind drift the errors will not have as much effect. I like light, handy rifles and I also like the upper end of ballistic performance. Two of my rifles are a 7mm-08 ackley AI with a 20" barrel that weighs 7.5 lbs ready to hunt another is a .300 RUM with a 27" barrel that weighs 12.4 lbs. They are both very accurate but serve two different purposes. How I intend to hunt dictates which rifle I carry. Optimum ballistic performance and extreme light weight and compactness rest on a fulcrum. You just have to decide which side is the best for you to lean to.
  7. I own rifles with barrels from 16 to 27 inches. I choose the barrel length based on the cartridge and how I plan to use the rifle. I did some research years back when I was thinking about building a 20" barrel 7mm-08AI. One of the most useful items I found were tests done by a gunsmith named Charlie Sisk posted on another forum. I copied them and saved them as some of the best real world data I was able to locate on what happens to velocity as you shorten a barrel. What follows are his introduction and test results. For a long time I have wondered about how barrel length affected velocity. I had always been told you need a certain length barrel for certain calibers. I have read when folks compared one gun to another with different lengths but I always thought that was not an apples to apples comparison. So I did a few tests myself. All these were Shilen barrels. I used the same brass throughout the whole test. All weighed to with 1 grain. Bullets were tested on the Juenke machine. Powder charges were weighed to .1 grain. The same rest, chronograph, Redding press, primers all from the same lot, bullets for the same box, same lathe, same crowning tool, same cutoff tool, and each rifle done from start to finish on the same day. Ambient temperature was the same because I shoot from inside the shop. I held the rifle the same way on the rest every time. I shot ten rounds first to break in the barrel. Then cleaned with Sweets and fired one fouling shot. Then shot five rounds and took the average. I used a midrange load from the Nosler book, not too hot but certainly not a reduced load. Here is what I got. 22-250 Hodgdon 380 34 grains Federal GM210M Remington brass 55 grain Ballistic Tip 27 inches 3469 fps 26 3451 25 3425 24 3407 56 fps from highest to lowest 270 Winchester Hodgdon 4350 54 grains Federal GM210M Winchester brass 130 grain Sierra 27 inches 3115 fps 26 3093 25 3071 24 3054 23 3035 22 3027 21 3001 114 fps from highest to lowest 300 Winchester mag Federal GM215M Winchester brass 74 grains of Reloder 22 180 grain Partition 27 inches 3055 fps 26 3031 25 3024 24 3003 23 2984 22 2960 95 fps from highest to lowest 340 Weatherby Federal GM215M 250 grain Sierra 81 grains Reloder 22 Wby brass 27 inches 2837 fps 26 2817 25 2809 24 2791 23 2777 22 2755 21 2731 106 fps from highest to lowest I think I will do a little more thinking before I recommend a barrel length in the future. What do you folks think ? Charlie A few weeks ago I done some testing with shortening barrels with various calibers. I just finished this test with a 300 Ultra. These loads were EXTREMELY HOT !!!!!!!!! I will not post the grains here because on the third loading the primer would fall out of the case . I never load this hot , only this time for the test. I used Remington brass, Federal GM215M primers, 220 grain round nose bullets. I used the same procedures as the last test. length H-4895 H-870 .....27 2740 3107 .....26 2709 3088 .....25 2685 3062 .....24 2663 3046 .....23 2636 3018 .....22 2612 2997 H-4895 lost 128 fps H-870 lost 110 fps
  8. I have been given the opportunity to be involved with several Hunts For Heroes hunts. Sometimes as a guide other times as a pack mule. It is an incredible experience that really makes you feel as If you have done something that really matters. The video just scratches the surface, spend a day hunting with one of these veterans and you will be amazed at how much the opportunity truly means to them. Send Tom (Lv2hnt) a message and ask how you might get involved with a hunt. You will be doing something very nice for someone who truly deserves it at the same time you are doing something you really enjoy.
  9. I work for a freight company and the yard tractors that move trailers around the yard in and out of the dock use that same basic Cummins motor. They run all day long, year after year. Is Dodge running bigger turbos to get more boost to produce more power and as a result sacrificing engine lifespan?
  10. Building the loaner rifle is a real cool thing to do. I remember when I used to shoot competitively loaning a carbine or a shotgun to someone who was trying to transition from straight pistol matches to 3-gun matches. It was always greatly appreciated.
  11. 300RUM

    What broadhead brotherhood member is this?

    You really need a picture of a McKenzie antler to practice shooting at
  12. 300RUM

    Berger bullets on Coues...

    To inflict a quickly incapacitating injury a bullet must transfer much of its energy to the target animal. The bullet may be designed to expand, explode or tumble to accomplish this. A bullet may also do none of those but have enough mass and velocity that it causes a massive temporary wound channel that leaves extensive permanent tissue damage, hydrostatic shock. I once put a round from a .300 RUM through an antelope at 400 yards. The exit wound was tiny but the lungs were like pudding. There are many variables when shooting a bullet into a body and no bullet will perform optimally 100% of the time. Even if a small percentage of the bullets of any given brand fail to perform properly you are going to hear about it. When the bullet fails to perform as expected people will be very vocal about it. When the bullet performs properly then the bullet just did its job and there is often not much to be said.
  13. 300RUM

    Practice much?

    Did we all just fall down a rabbit hole and end up in San Francisco?
  14. 300RUM

    Practice much?

    That isn't a practice issue, it is a common sense issue. Shoot / Don't Shoot. Someone got that one very, very wrong.
  15. 300RUM

    How to annoy a liberal

    With the unfortunate event that occurred In Las Vegas you are very likely to encounter liberals running their mouths about banning gun ownership. Don't engage them in a debate on the second amendment, it is what they expect. Instead tell them you feel they should not have a right to make the statements they just did. They will likely go on a rant about their first amendment right to do so. Point out that their free speech seeks to infringe on the constitutional rights of others and is actually attacking the constitution itself. It is therefore dangerous and needs to be censored, possibly even treated as a criminal act. Keep at it as straight faced and serious as you can. I have been doing this for a number of years and have gotten much amusement from taking this approach. It gets some of them really upset that you should be so unreasonable. Imagine that.
  16. 300RUM

    Help Me Find It

    It was by BoneCollector. Look under taxidermy. It's something like Pronghorn double wall pedestal.
  17. 300RUM

    Daughter's First Elk

    But if they did I have heard it pairs well with some fava beans and a nice Chianti.
  18. 300RUM

    Daughter's First Elk

    Congratulations nice, looking bull. You might look into something called a fillet glove. They can be made from either a cut resistant fiber or small interlocking stainless steel rings.
  19. 300RUM

    NUT JOB

    With an AR you can use a bumpfire stock or a trigger crank to achieve "artificial" full auto. It is legally not full auto because the weapon only fires only round per pull of the trigger, the definition of semi auto. You can file away on trigger parts to achieve an illegal shade tree full auto. This will leave the gun in a state where it will fire a round even if the bolt does not lock. You could Illegally fabricate and install an auto sear so the weapon is mechanically similar to a M-16. The guy had plenty of options available to achieve full auto fire. I would expect the probability that it was a legal NFA weapon is fairly low. I don't see the big question being how did he get a full auto rifle. The big question is why did he do it. Some are already calling it terrorism. So far no one has exposed a political, ideological or religious motivation for his actions. He may just be a mass murderer. Either way he is a criminal whose actions will be exploited by some in attempts to infringe on the rights of law abiding citizens.
  20. 300RUM

    What happened here?

    I came across this while assisting on an elk hunt last week. The entire skeleton is present. I have a theory. Just curious if others will come to the same conclusion as I did.
  21. 300RUM

    7E Bull

    That is a real nice looking bull! I'm sure your father-in-law would be proud.
  22. Regrettably, I have been seating a bullet inside a pinched, once fired case into the rifle 3 times and taking an average COAL, then seating down 0.01" from there. I just got my comparator so I'm looking forward to using CBTO from here on out. Thank you for the offer! I will check out the Sinclair tool and let you know if I want to try yours first. It is possible for the bullet to catch in the lands and pull part of the way back out of the case before the entire round starts to move out of the chamber. This would give you an incorrect, long COAL to lands.
  23. The factory accubond load being hot is interesting. It still seems like there has to be a problem somewhere in the reloads. How are you measuring COAL to lands? I have a Sinclair tool that measures from the base of a bullet seated at the lands then from the base of a fired case in the chamber. Subtract B from A, add the length of the bullet and you have a figure that's based off the actual bullet against the lands and the cartridge in the chamber. If you want to try it that way shoot me a message. I'm in Chandler.
  24. Dump out some of your H1000 on a tray and take a real good look at it. Is it possible it's been contaminated by mixing in a faster burning powder on accident? That would give you pressure problems. You wouldn't be the first guy to do that one and you would be somewhere in line behind me.
  25. You have a really unusual problem. It is possible the bullet could do it. If you have a box of bullets that were somehow manufactured oversized in diameter and made it past QC. An oversize bullet would be harder to force through the bore and increase pressure. Measure the accubond's diameter to rule that one out.
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