Iron, hopefully someone can correct me if I'm wrong but here is barrel life and why its subjective.
6.5 cm / 260 rem = 3k-5k
308 = 7k-13k
Thus will depend on your shooting cadence, maintenance, etc. if you shoot like a competitor, barrel life will degrade faster.
One thing I'm unsure about and hopefully someone on sh can correct me, if you shoot past a barrel life, will anything drastic happen other than drop in accuracy?
I say this because if you're not competing or anything crazy, you can keep shooting from they same barrel until its completely worn down. Main reason why competitors change out barrel is because it shoots from 1/4 moa to 1moa.
If you're not doing anything fancy other than just plinking, no need to swap barrels until way later.
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