Not specifically single cask or otherwise.
There are many CS bottlings (I immediately think of Macallan 10 CS, the Laphroaig CS bottlings, Ardbeg Uigeadail plus many more) which are not single casks.
Having said this, if I were to turn your question around and ask "Are Single Cask bottlings usually bottled at CS?" then although the answer is still not always, I think you may find that quite a high proportion are.
Now, as I think aloud a little, please stay with me......
Firstly I think of Macallan 10 CS. There are many versions of this on the market, each with a difference of only a percentage point or two in the actual strength.
When casks are vatted for a large bottling, the volume of the cask is knowm as is the strength of each one. So surely this is only a simple calculation to get the strength correctly measured for the whole bottling.
But once again, all I can add are thoughts and more questions, not definitve answers to this one.
In the case of IB's, with perhaps the exception of some Gordon & MacPhail offerings, I would suggest that the majority of bottlings are single casks.
scotch4ever wrote:I often wondered how could one have a consistent CS % in a Vatting? If every cask has it's own characteristics than how can there be a consistent % of alcohol? Is there some leway given to bottlers about the % of alcohol? Meaning does the industry allow a % +/- in either direction? Has anyone ever measured there different bottles to check?
Ahh..great question indeed!!
As M-T pointed out there are slight variances in the % Alc/Vol in different bottlings at times...Is it maybe the distillery dumps the barrels and then takes the %Alc/Vol reading on the whole vatting??
I have noticed though the glenfiddich C/S is always at 51%...throughout the world. Which makes me think again about scotch4ever's comment...How do they get this so consistant?? Surely they have to play with it a bit...??
Perhaps some cask strength whiskies aren't really cask strength, like those which manage a consistent strength year in, year out. Those like the Aberlour a'bunadh and the various Balvenie offerings seem much more reliable on that score.
I would have thought some legal eagles would have been onto this??
Maybe there needs to be a legal definition of the term "Cask Strength" - The %Alc/Vol of the spirit in a single cask that has not had any additional additives before bottling or in the case of a vatting, the quantity of barrels to be emptied into a vat and taking the %Alc/Vol on the whole vat, having no additional additives before bottling.
That's what I would determine Cask Strength to be...
Same would go for Bourbon and the term "Barrel Proof".
a cask strength that is a single barrel bottling will most probably state so on the label.
As most OB bottlings that are cask strength are vattings, it depends on the age of the barrels used to determine the strength of that vatting. Therefor as a rule of thumb 10 year old cask strength vattings are of lower abv than cs vattings with no age statement as the whiskies used are younger and the angels did not have their share to the full yet.
It might well be a elegant way of getting rid of casks that did not work out so well as the higher abv tends to mask minor flaws in those casks and vatting dilutes those flaws further.
That does not mean that cs bottlings are bad or that they are inferior.
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