Hi.
Questioned to find out the reserve barrel Marlin XL7 30-06.
From the current owner of Marlin Remington company has received the following reply:

Customer-Resource of barrel Marlin XL7 30-06 and XS7 .243 Win.?
Response-The barrels are produced by Marlin in house.

Customer - What resource of barrel on how many shots he expected 5000 or 20000 shots???
Response-There is not an answer for expected life of a barrel and we cannot advise how many shots could be expected this depends upon ammo and maintenance only.

It is enough pent-up appealed to well-known expert on these matters
Jeff Quinn:
Hi Jeff.
I put a question what resource of barrel Marlin XL7 30-06 and XS7 .243 Win. on how many shots he expected 5000 or 20000 shots?

and received a reply

I would expect at least 5000.
Jeff

So, what can be considered the minimum resource shots for barrel Marlin XL7 30-06 and XS7 .243 Win.
5000 shots.
P.S.
Standard cartridge+"Recommendations" Remington on the proper care of the barrel and use a normal cartridge.