Maturing blackberry wine in oak barrels

[Fruitloop84]

Hi,
I have a 30 litre Hungarian oak cask and I want to mature blackberry wine in it instead of in bottles after the final rack . It previously held whiskey so hopefully there isn't to much bacteria in there. Is this possible our will it spoil?

 

[Bando]

Since you're not sure and its previously had something in and not been kept properly id say add Campden and stabiliser to the wine beforehand in the usual amounts but I may be wrong