trigger45
Member
how fast does the barrel "go bad" in a .270 vs. the 7mm mag or for the .243? does one last longer than the other?
barrel erosion for .243, .270, and 7mm Rem mag
- Thread starter trigger45
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yes, but you are not likely to shoot any of 'em out.
the 270 will probably last the longest. not sure about 243 or 7 rem mag - they both burn relatively large amounts of powder for their bore diameter. 7 rem mag will probably burn out before the 243, if you count number of shots. if you are counting number of years, 243 will probably go first because you are likely to put more shots downrange w/ it, and you are more likely to heat the bore, and worst of all, more likely to shoot it while the barrel is hot.
i wouldn't pick one of these chamberings based on barrel life. and, if you do burn a barrel out, just have a new one put on. if you are shooting factory loads, you will have far, far, far more money stuck into ammo alone than you would multiple barrels.
the 270 will probably last the longest. not sure about 243 or 7 rem mag - they both burn relatively large amounts of powder for their bore diameter. 7 rem mag will probably burn out before the 243, if you count number of shots. if you are counting number of years, 243 will probably go first because you are likely to put more shots downrange w/ it, and you are more likely to heat the bore, and worst of all, more likely to shoot it while the barrel is hot.
i wouldn't pick one of these chamberings based on barrel life. and, if you do burn a barrel out, just have a new one put on. if you are shooting factory loads, you will have far, far, far more money stuck into ammo alone than you would multiple barrels.
Art Eatman
Moderator In Memoriam
In the FWIW department: I never shoot a whole bunch at any one testing session with my hunting rifles. Thus, they never really get hot during shooting.
I have a .243 I bought in 1970 or so. It probably has maybe a thousand rounds through it. It still will put three inside a dime at 100 yards if I do my part...
Art
I have a .243 I bought in 1970 or so. It probably has maybe a thousand rounds through it. It still will put three inside a dime at 100 yards if I do my part...
Art
kaferhaus
Member
A study was done some years ago and the results were if everything else remained the same (barrel temp etc.) it takes a certain # of pounds of powder to erode the throat of a barrel before it starts to lose it's accuracy potential.
Had nothing to do with velocity, only the amount of powder consumed... in other words, big boomers burn out quicker.
a 223 would last longer than a 243, the 243 longer than the 270 etc.
Had nothing to do with velocity, only the amount of powder consumed... in other words, big boomers burn out quicker.
a 223 would last longer than a 243, the 243 longer than the 270 etc.
Drue
Member
I got my 700 ADL .243 in 1975. The groups are starting to open up and it has about 2700 rounds through it.
Drue
Drue
artherd
member
Soooo, I really should stop dumping mags from the offhand in my Barrett, yes?
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