School me on barrel erosion

[Hayata]

So does your barrel wear the same whether it is hot or not?

Do the 30 rounds after a mag dump wear the barrel faster than 30 cold shots?

 

[Gunsite Grad]

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[Dinky Dau]

So does your barrel wear the same whether it is hot or not?

Do the 30 rounds after a mag dump wear the barrel faster than 30 cold shots?

Good question!! In Nam the 50s barrels had to be changed after so many rounds due to warping. As far as your question, if only 30 rounds hot I would think, due to expansion of barrel from heat there would be less friction. On a cold barrel there would be more, but I have no Idea! Looking forward to the discussion on this topic. Thank Pimp Hat Man!

 

[Woodstock]

Id agree with DD, metal expands with heat so there should be less friction from the barrel

 

[qodeBebop]

No clue but if I had to guess 30 rapid shots would be worse than 30 slow due to heat and throat erosion. I'm just gonna shoot mine fast when I need to or want to and replace it when the time comes.

 

[Shrek926]

Short answer is hot barrels erode faster. If I can figure out how to attach it I'll send a report on it that breaks down why.

 

[dial1911]

I think this goes back to the barrel wear testing someone did to compare Wolf vs. "good" brass cased ammo. I remember one of the theories as to why the Wolf ammo was harder on the barrel involved the variance in projectile diameter. The argument was that smaller projectiles allowed hot gas to escape around the projectile, thereby accelerating barrel wear.

If the barrel steel expands, the projectile does not. This, in theory, allows gas to escape forward of the projectile similar to the Wolf argument above.

 

[freedom]

I think this goes back to the barrel wear testing someone did to compare Wolf vs. "good" brass cased ammo. I remember one of the theories as to why the Wolf ammo was harder on the barrel involved the variance in projectile diameter. The argument was that smaller projectiles allowed hot gas to escape around the projectile, thereby accelerating barrel wear.

If the barrel steel expands, the projectile does not. This, in theory, allows gas to escape forward of the projectile similar to the Wolf argument above.

We don't need no engineering here. Either pull info out your rear or move on, this is the internets.

 

[dial1911]

We don't need no engineering here. Either pull info out your rear or move on, this is the internets.

Ahhh... well, I meant "science an stuf"

 

[Hayata]

Short answer is hot barrels erode faster. If I can figure out how to attach it I'll send a report on it that breaks down why.

Cool.

Hey, didn't know you were on this site.

Thanks for your response!

How's your daughter and her shooting exploits?

 

[EugenFJR]

I think this goes back to the barrel wear testing someone did to compare Wolf vs. "good" brass cased ammo. I remember one of the theories as to why the Wolf ammo was harder on the barrel involved the variance in projectile diameter. The argument was that smaller projectiles allowed hot gas to escape around the projectile, thereby accelerating barrel wear.

If the barrel steel expands, the projectile does not. This, in theory, allows gas to escape forward of the projectile similar to the Wolf argument above.

I also thought it had something to do w/ the steel cases ammo was "eating up" the throat, so much so, that around 5000 rounds, it was a "no-go" on the gauge, and the gun was shooting around 7-8 MOA (maybe worse) because of excessive wear at the throat and barrel. Its been awhile since I've seen that artical.

 

[Laufen]

Heat will decrease a metals resistance to wear, no doubt. When you heat up your barrel through rapid fire, the throat will see the most erosion as it gets the hottest. I'd be more worried about throat erosion.

 

[PewPewPewCo]

So does your barrel wear the same whether it is hot or not?

Do the 30 rounds after a mag dump wear the barrel faster than 30 cold shots?

The hotter it is, the greater the wear.

Water jackets greatly preserve barrel life.

Also he polymer barre jacket(can't remember the name, but they make a jacket for the mosin) also pulls heat away and reduces speed of erosion

 

[DarthVader]

I think this goes back to the barrel wear testing someone did to compare Wolf vs. "good" brass cased ammo. I remember one of the theories as to why the Wolf ammo was harder on the barrel involved the variance in projectile diameter. The argument was that smaller projectiles allowed hot gas to escape around the projectile, thereby accelerating barrel wear.

If the barrel steel expands, the projectile does not. This, in theory, allows gas to escape forward of the projectile similar to the Wolf argument above.

If you're referring to the lucky gunner test, it was determined that the mild steel jacket used in projectiles of the Wolf ammo caused greater wear.

 

[dial1911]

If you're referring to the lucky gunner test, it was determined that the mild steel jacket used in projectiles of the Wolf ammo caused greater wear.

Ah- gotcha. The "lucky gunner" name rings a bell. My selective memory stuck with the gas blow by and didn't pick up on the jacket material.

 

[Shrek926]

Cool.

Hey, didn't know you were on this site.

Thanks for your response!

How's your daughter and her shooting exploits?

She's doing great, the youngest has joined her now. I now stay busy with them and life, and only drop by here on very rare occasions. (And other places never)

 

[DarthVader]

She's doing great, the youngest has joined her now. I now stay busy with them and life, and only drop by here on very rare occasions. (And other places never)

Glad to see you Shrek! (mtdawg169 on the other site)