Barrel burner.

[heretohunt]

My question is what makes a barrel burner? Is it the speed of the projectile or unburnt powder going down the barrel. I've often heard of certain calibers ( cartridge or chambering if you prefer) being considered to be a barrel burner. I have some a .204 that can easily approach 4000 fps. Is there a danger?

[elkhunter11]

It's generally a combination of powder capacity, pressure and overbore, and how you treat the barrel. If you run maximum loads with a large capacity overbore cartridge, the barrel life will be shortened. If you repeatedly heat the barrel up,it will accelerate throat erosion.

[Pathfinder76]

Heat not friction.

[silver]

Not sure if I am on thin ice or not, but I have read of differences between single base and double base powders. One burns hotter than the other. Have also read Stainless steel is more resistant to barrel erosion than chrome moly. I am sure if I am wrong, some one will point it out.

[6.5 shooter]

Think of your brass, powder, bore like a cutting torch.

lots of gas = heat, small bore = erosion.

Large bore, less gas = less heat, less erosion.

500 rounds one right after the other = heat and more erosion.

If the barrel is too hot to touch then your getting it to hot, no matter what cutting torch your using.

[Fredo]

Length of the bullet is supposed to have an influence.
The longer the bullet the more abrasion, correct me politely if I'm wrong!