Long Range 101 Part 37 - Chemical Bore Erosion EXPLAINED

Long Range 101 Part 37 - Chemical Bore Erosion EXPLAINED - Rex Reviews

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11 жыл бұрын

The service life of your rifle bore can can vary greatly depending on a number of factors. One of these factors is the chemical erosion that embrittles the steel of your barrel and makes it much more vulnerable to erosion by thermal and mechanical erosion mechanisms. Understanding how these various bore erosion mechanisms interact is fundamental for the long range shooter to understand who has to be able to anticipate how these changes in internal ballistics will affect the departure of the bullet from his rifle bore. Also, understanding how these erosion mechanisms change the internal friction dynamics of the bore / projectile relationships will help us to develop a long range shooting bore maintenance regime that causes minimal changes to the frictional nature of the rifling so that shots at long range are not thrown off by unexpected changes in internal ballistics.
All the music, animations, and photography in this video were created by TiborasaurusRex, and unsigned artist.
Song Title: Wadi Watir
Music and Lyrics by: TiborasaurusRex
Instrumentation and Vocals by: TiborasaurusRex
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Пікірлер: 59

@TiborasaurusRex 5 жыл бұрын

Come train with Rex - in person!!!

@TiborasaurusRex 11 жыл бұрын

As far as I have read, some nitriding does occur as a result of firing. Military researchers have been putting allot of money into developing powders that nitride the tubes of artillery pieces during firing to increase service life. Although allot of that research has been based on improving black powder propellant recipes, much of it has carried over to smokeless powder. Do a google ‘scholar search’ on the effects of nitrogen on gun tubes and you should find a few good papers on the subject.

@TiborasaurusRex 11 жыл бұрын

Thanks for watching :-)

@TiborasaurusRex 11 жыл бұрын

Lapping is polishing the bore nice and smooth, which can reduce the amount of time required for break in, but erosion will occur no matter what.

@doejohn8674 5 жыл бұрын

Great series, highly educational, watching since part one, one or two episodes a day, can't thank you enough for making this video series!

@TiborasaurusRex 11 жыл бұрын

The cartridge will have no problem getting you out to 1500m. The rifle should be capable of very good accuracy as well, if the stock doesn't cause too many problems. You will want 1/2 - 3/4 moa for 1500m, so you may have to do some stock work if the rifle isn't up to those accuracy requirements. Typically, you can expect 1moa out of the box on these rifles, sometimes better. With load development and minor stock work if needed, this should work fine. :-)

@HarrisonCountyStudio 4 жыл бұрын

Great information Rex. I’m watching your series again! this time, with a note pad. My wife is a high school physics teacher, and she enjoyed your presentation too👍🏾. She loves the science! Thanks for all of your work ✌🏽

@steven4719 11 жыл бұрын

Thank you so much for this info!! Exactly what I have been looking for for a long time.

@brandon152lee 11 жыл бұрын

Thank you for all you time and effort to make all these videos. I am an engineer and enjoy the hands on application of real world physics and find it very easy to understand your logic and reason. Keep it up and make damn sure you have hard copies that you can redistribute just in case...

@TiborasaurusRex 11 жыл бұрын

Chrome lining very effectively protects rifle bores from erosion, however, due to flaking because of the differential thermal expansion of impurities beneath the chrome, this can reduce the level of precision obtainable from a chrome lined bore. If you are operating in highly corrosive saltwater environments, the benefits of chrome lining will outweigh the shortcomings. Where its very dry, chrome lining is less beneficial.

@danielmazanec9393 10 жыл бұрын

Absolutely amazing. Thanks, TRex.

@MTConcealmentSystems 11 жыл бұрын

You got skillz bro. Watching every video made me better. They didn't teach me most of this stuff in the infantry. This info is helping us design our next concealment system. Thanks much.

@sellyae 10 жыл бұрын

sir. I have enjoyed your videos I have been looking for info. on long range shooting been pistol man for many years due too law enforcement jobs but really enjoying learning the rifle. keep up the good info. look forward to finishing your video sniper 101.

@TiborasaurusRex 11 жыл бұрын

Oops, I was trying to get to the punch line too fast. Yes, chryonising steel can relieve some of the stress built up in the lattice structure and slow the thermal cracking process thereby reducing the rate of chemical erosion due to increased surface area. All in all, it will slow chemical and mechanical erosion on the microscopic level, but will not usually translate to a significant advantage it terms of measurable accuracy retention after a given number of rounds fired.

@TiborasaurusRex 11 жыл бұрын

Nitriding the barrel is actually very effective, and you are correct, it would be best to break it in first. However, you will want to be sure that you clean it very good before sending it in. You will want to accomplish a full copper removal. In this case, an aggressive copper solvent like KG12 would we warranted. Make sure its perfectly clean before you send it in or you may have a bad case of differential erosion down the road.

@EmperorArek 11 жыл бұрын

great video, thank you for uploading

@TiborasaurusRex 11 жыл бұрын

A nice lapped bore will be better than a rough one, but erosion stills occurs. We'll talk about thermal and mechanical erosion mechanisms next :-)

@TiborasaurusRex 11 жыл бұрын

Pirates at sea? Most precision rifle engagements against pirates at sea by SOF are conducted inside 100m. Ships are not very stable shooting platforms, so you can't effectively shoot at distances where the TOF of the bullet is very lengthy at all. The last rifle engagement I am aware of at sea against pirates was done at only 40m - almost point blank range. This gives you nearly a 100% hit probability.

@TiborasaurusRex 11 жыл бұрын

Right on. That would be great for those 3mph whisker-ticklers.

@TiborasaurusRex 11 жыл бұрын

No problem. Just make sure its nice and tight when you install it. You don't want it wiggling around. Otherwise follow the instructions step by step and it should work great.