What proof is Michter's US*1 Single Barrel Rye?
84.8 proof, or 42.4% alcohol by volume — a fixed strength that every bottle of this expression carries. That is worth saying plainly, because Michter's also makes a Barrel Strength Rye, a separate release whose strength changes from barrel to barrel and year to year. This is the standard US★1 rye, proofed to a consistent 84.8, which is low for the category and deliberately so.
How old is Michter's US*1 Kentucky Straight Rye?
Michter's publishes no age statement for it. Under US labelling rules a straight whiskey carrying no age statement must be at least four years old, so four years is a floor rather than an estimate, and the true age of any given cask is not disclosed. Each bottle comes from a single barrel released when Master Distiller Dan McKee and the Michter's tasting panel judge it ready, rather than at a fixed age.
What does the barrel number on a Michter's US*1 Rye mean?
It identifies the individual cask your bottle was drawn from. Every bottle of US★1 Kentucky Straight Rye comes from one barrel rather than a marriage of many, so the number handwritten on the neck tag is specific to that single cask. Two bottles carrying different numbers are the same whiskey, made the same way to the same strength, but they are not identical liquid — which is the point of a single barrel release.