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ghermitage
Reply with quote  #1 
What difference in barrel life is seen between the 260 and the 7mm-08?
Rustystud
Reply with quote  #2 
ghermitage:

There is very little difference in the 260 and 7mm08 barrel life. Both with resonable laods should last 2400-2900 with out a set back. If you set-back at 2000 to 2500 you will most likely get 3600-3800 rounds. This is contingent in what loads you shoot.
Rustystud
ghermitage
Reply with quote  #3 
The barrel life of the 308W is said to 5000+ rounds. Does all of this benefit occur between 7mm-08 and 308W, and none between 260 and 7mm-08?
JOHN708
Reply with quote  #4 
The barrel life of a heavy, match barrel 708, shooting 168 Serria's is 3000 rds. I shot out 2 barrels, shooting across the course, and they both went at that number. My 260's are shot out at 2600 rds. With set back, you can get 3600 rds out of the barrel. Hope this helps.

John Skowron
ghermitage
Reply with quote  #5 
Okay, looking at a larger spread of bore sizes on the same case, how about the difference in barrel life between 243W, 260R, 7mm-08, 308W?

I have seen figures of 1500 rounds for 243, 5000+ for 308, but I would expect a smooth function of barrel life versus bore size on this same case.
AlanPF
Reply with quote  #6 
Quote:
Originally Posted by ghermitage
...I would expect a smooth function of barrel life versus bore size on this same case...
Maybe its a smooth function, but it doesn't appear to be a direct relationship with bore diameter, or even bore area. A .308 has about 60% more x-sectional bore area than .243, but the evidence is for about 200% more life.

Alan
ghermitage
Reply with quote  #7 
No, I wouldn't expect a linear relationship with bore size or bore area, but I wouldn't expect any irregularity in how barrel life progresses with bore size.
ghermitage
Reply with quote  #8 
Quote:
Originally Posted by AlanPF
Quote:
Originally Posted by ghermitage
...I would expect a smooth function of barrel life versus bore size on this same case...
Maybe its a smooth function, but it doesn't appear to be a direct relationship with bore diameter, or even bore area. A .308 has about 60% more x-sectional bore area than .243, but the evidence is for about 200% more life.

Alan


Actually, on that data there could still be a linear relationship between x-sectional bore area and barrel life with the slope constant (m) in the linear relationship not being 1 e.g. y = mx + c with m not equal 1.
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