Keg King Chubby to 50 litre Keg? Suggested recipes/ ratios etc?

[K C L]

I’ve started extract brewing with a small kettle and keg king chubby.

I’m looking for any suggested recipes & advice on high gravity brewing. I’d like to use the Chubby to get a 4/5% abv lager in a 50 litre / 1/2 barrel keg.

I understand that the keg can have 30-40% water added.

What kind of starting gravity would I need and how much water in the keg? How many extra IBU’s would I need in the kettle?

Many thanks for any tips and suggestions!

 

[K C L]

I’ve started extract brewing with a small kettle and keg king chubby.

I’m looking for any suggested recipes & advice on high gravity brewing. I’d like to use the Chubby to get a 4/5% abv lager in a 50 litre / 1/2 barrel keg.

I understand that the keg can have 30-40% water added before fermentation.

What kind of starting gravity would I need and how much water in the keg? How many extract IBU’s would I need in the kettle?

Many thanks for any tips and suggestions!

A few typos, the water would have to be in the keg post fermentation, boiled, purged, possibly carbonated etc before any transfer….