Why gun barrels are rifled

But I started looking for one. I finally remembered that my friend Vern had such a set-up that he used for deer hunting. I gave him a call and explained the problem to him and he agreed to go to the range with me and see what we could see. It is a Remingtonset up with a

Why gun barrels are rifled

What is your opinion of the deep cryogenic processing of barrels? What is your opinion of the use of moly coated bullets? What are the differences between chrome-moly barrels and stainless steel barrels? What are the differences between 3 Groove and 6 Groove Barrels? Why do you have so many choices in twist rates?

What is hand lapping? Why is there a saw cut near the muzzle end of your rifle barrels? Does Fluting cause stress in a rifle barrel? What does Lilja Rifle Barrels think of the use of bore solvents with ammonia?

What are the advantages to purchasing a Lilja 22 rimfire drop-in barrel? What federal laws and taxes apply to rifle barrels? Can stainless steel barrels be safely fired in sub zero temperatures?

What do you think of bore sighting equipment that slips into the muzzle?

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What is the difference between a drop-in barrel and a barrel that needs gunsmithing? Does Lilja have tours of their shop and facilities? Does Lilja have a recommended cleaning and break-in procedure?

Does Lilja use a video borescope? The cryogenic treating of barrels at a temperature of degrees below zero has been a hot topic of discussion lately.

Our short answer is that it will not harm your barrel but we are not completely convinced of all of the benefits claimed by some. The only benefits that we feel are likely to result from the treatment are possibly a longer barrel life and a slight increase in machinability.

Claims for increased accuracy through stress relief are not founded in our opinion. When barrels are button rifled no material is removed, it is just displaced. This causes stresses to be formed in the steel. If these stresses are not removed problems will result. These negative conditions include warping of the barrel during other machining operations, an increase in the bore diameter towards the muzzle end of the barrel during the contouring phase, and in the extreme, lengthwise splitting of the barrel.

Also, if there are stresses remaining in the barrel they can be slowly released as a barrel warms up during firing. This causes the barrel to actually move during the course of shooting, causing inaccuracy. In our testing we have found that the only effective means to completely remove the types of stresses introduced during rifling are with conventional heat treating using elevated temperatures.

The degree treatment alone will not remove these stresses. The key words here are remaining stresses. We do know through our testing that the cold treatment alone will not remove any significant amount of stress and that the problems outlined above concerning stress will remain in the barrel.

Why gun barrels are rifled

So, because of the very limited amount of stress that could be removed with the cold treatment if the barrel has been properly stress relieved with heat as our barrels are we do not believe that there can be much if any accuracy benefit to the degree treatment of our barrels.

It is for these reasons that we feel the cold process has very little potential for increasing the accuracy of our barrels. In our opinion, other than the removal of these stresses, there are no other mechanical factors involved that could benefit accuracy in a rifle barrel, resulting from a heat treating operation, either hot or cold.

For reasons not completely understood however there may be an increase in the wear resistance of the steel. This type of wear however does not contribute greatly to barrel erosion. We invite you to read our comments on this type of barrel wear in the question regarding the use of moly coated bullets.

Another possible side benefit to the freezing process is a slight increase in its machinability. Since I originally wrote this an excellent article by Kevin Thomas of Sierra Bullets was printed in the September, issue of Precision Shooting magazine.

Thomas found, in a controlled test, that there was little benefit to deep freezing match grade barrels. He could see no difference in accuracy but probably a slight increase in useful life. I would encourage anyone interested in this subject to take a look at this article.

First, as described in our section on barrel break-in, we do not recommend the use of moly coated bullets for break-in. The break-in process requires the use of an uncoated jacket if it is to be successful.

There are two basic claims made for the use of moly, reduced fouling and increased barrel life.Modern manufactured pistol barrels are rifled they have “lands” and “groves” just like a “rifled” rifle barrel.

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This assists in bullet stabilization and which in turn assists in accuracy of the round fired. This post reviews what barrels the best precision rifle shooters in the country are using. It shows brands, barrel contours, and barrel length by cartridge. Mar 04,  · Difference between rifled and cylinder bore shotgun barrels.

comparing rifled vs sabot slugs. Feb 15,  · BHW barrels were the only thing I could find in stock. 20" 1 in 8 twist BHW polygonal rifled barrels would not stabilize 77 gr.

SMKs, but 16" conventionally rifled 1 in 8 barrels had no problem with the same SMKs. Hammer forged barrels do not have a very visible presence in the accurate gun world, so I will confine this discussion as to the relative merits of cut versus button rifled barrels.

If it is so easy to rifle barrels using a button, why do some barrel makers persist in the difficult, time consuming art of cut rifling? Rifled gun barrels are more consistent in terms of internal ballistics.

And we should also consider that a lot of the time, round balls jammed through rifled barrels aren't really balls anymore. Of course I could just be wrong on how rifling helps accuracy in round balls so please correct me if you see an issue there.

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