Bill McCarthy wrote:“The MacAllan As We Get It”. - 103% proof. If you find one don’t drink it ,
My late dad was in H M Customs & Excise and in his early training years was stationed in Scotland loosely attached to an area dealing with a number of distilleries.
In working out duty to be paid on a barrel of whisky after storage allowance had to be made for evapouration (the 'angels share' as it is poetically called in the Cognac region of France).
The common practice of 'grogging' played havoc with estimations of specific gravity and was very hard to stamp out.
'Grogging' being the practice by distillery workers of chucking a bucket of water into recently emptied whisky barrels, and rolling them round the yard for an hour or so, which produced by dint of leeching out the whisky from the wood, a very acceptable bottle or three of free scotch.........
Subsequent barrels of scotch stored in these 'grogged' barrels suffered the reverse effect, much of the alcohol absorbing back into the wood.......................