Barrel Burn Out

[Jake Leibke]

It's not gonna live long, that's overbore as heck....but it should be fun on the way. If you are hoping for peak accuracy, expect to change seating length about every 100 rds.

That’s what I was wondering about. Thanks. Was also looking at the 22 creed also but guessing that’s in the same boat.


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[EdP]

I think the macro mechanics of it are pretty simple. Hot gasses at high speed erode the throat through the combined effects of burning away some of the metal and scouring. (If you have ever seen a valve body steam cut due to a gasket leak it isn't hard to imagine). The barrel is more subject to damage from the gasses if it is already heated. More powder makes more gas, generates more heat, and for a given bore size moves at higher velocity. Managing those effects will go a long way towards preserving barrel life. Allow time between shots for the barrel to cool. Use moderate loads. Use heavy for caliber bullets - the gas can only move down the bore as fast as the bullet lets it.

The change in barrel life observed by 83cj-7 when he switched to a slower burning powder I think might be explained by a change in the bullet acceleration rate immediately after ignition and perhaps a lower peak throat temperature. That suggests using the slowest burning powder that gives the desired performance is also beneficial.

 

[left hunter]

Not exactly what your asking for but I would guess more barrels are ruined by improper cleaning methods and/or carrosion care than are actually shot out

 

[General RE LEE]

5k+ rounds

I don't think 6.5 CM life is 5k rounds, maybe 3K if really pampered.

 

[Pickettpuncher]

I don't think 6.5 CM life is 5k rounds, maybe 3K if really pampered.

I wouldn’t figure it would be that short. Subjective to rate of fire as well.

Not exactly what your asking for but I would guess more barrels are ruined by improper cleaning methods and/or corrosion care than are actually shot out

I would guess this kills more barrels than bullets do. Also why I think manufacturers have a “break in” period.

 

[2muchhp]

Op
You will get much of the same info if you search/Google overbore cartridges. All valid comments.

I love my 264win mag!

 

[gfh363]

just committed to buy a semi custom in 22 Creed and was wondering what knowledge I can lean on to get started. It‘a a gun that benchmark built with alpha munitions so I’m guessing it will shoot... it’s on a tikka T3x action.