Aging in used whiskey barrels

[mmmooretx]

I bought 2 15 gallon whiskey barrels for aging beer and have a couple of questions. How many times can you use them for aging beer, and are there general guidelines for maintenance of them?
Thanks in advance as I just finished aging a black IPA (8.7 ABV).
MIKE

 

[LordUlrich]

You should be able to use the barrels until they wear out (leak). If you get an infection the barrel is pretty hard to sanatize though. Also you will get less flavor as time goes on. The first one or two will pickup lots of whisky, later beers will be more oak/ slow oxidation flavors.

 

[abeasst]

on average how many batches are people getting out of a barrel?