The Seelbach's Guide to Rare Character Single Barrels

Blake Riber

Blake Riber

July 24, 2026

 If you've ever browsed a Rare Character single barrel release, you've probably noticed that the labels seem to speak their own language. Codes like RIO, K21 and TKO aren't just random combinations of letters, they're actually a roadmap to what's inside the bottle. 

 

Unlike most producers, Rare Character uses an alphanumeric barrel code and a colored wax top that lets enthusiasts decode the mashbill, age, origin and expected profile before even opening the bottle. The wax color indicates the similar flavor profile, allowing drinkers to identify their preferred tastes, while the code specifies the grain composition and source. 

 

Part of the excitement of hunting Rare Character single barrels is knowing that no two bottles are exactly alike. Each barrel develops its own personality over time, and Rare Character's coding system helps preserve that individuality. While most labels tell you only the basics, a Rare Character label invites you to look a little closer. Once you understand the code, you can quickly recognize familiar mashbills, compare barrel types, and even begin seeking out specific expressions that match your palate.

 

In this guide, we'll break this all down for you and highlight the Rare Character single barrels Seelbach's has selected along the way. Consider this your go-to Rare Character decoder.

 

Key Barrel Codes:

 

 

At Seelbach's, we've had the privilege of selecting a wide range of Rare Character single barrels over the years, each offering its own distinct personality. From high-proof Kentucky bourbons to elegant wheated expressions and spice-forward ryes, every selection tells a different story. 

 

Rare Character Single Barrels We've Selected:

 

9-year-11-Month Kentucky Straight Bourbon Whiskey

KHR-042: Short for Kentucky High Rye

Mashbill: 60% Corn, 36% Rye, 4% Malted Barley

Distilled In: Kentucky



9-Year-8-Month Straight Bourbon
MEL-034: MEL is a three-letter code that indicates a specific mashbill and flavor profile of bourbon. It typically represents a barrel distilled in Kentucky and aged on the lower floors of traditional rickhouses.
Mashbill: 75% Corn, 13% Rye, 12% Malted Barley
Distilled In: Kentucky

8-Year-3-Month Straight Rye
SRY-599: Short for Straight Rye Whiskey
Mashbill: 51% Corn, 45% Rye, 4% Malted Barley
Distilled In: Indiana

10-Year-8-Month Kentucky Straight Bourbon Whiskey
PLT-110: Short for Platinum, aged over 10 years and typically a higher proof
Mashbill: 78% Corn, 13% Rye, 9% Malted Barley
Distilled in: Kentucky


8-Year-1-Month Straight Bourbon Whiskey
RIO-317: The whiskey is distilled in Indiana (by MGP). It is then transported to Kentucky to be aged in warehouses right along the river. Hence RIO, which is Spanish for "river."
Mashbill: 75% Corn, 21% Rye, 4% Malted barley
Distilled In: Indiana

6-Year-7-Month Bourbon Finished in White Port Casks
WP-1: Short for White Port
Proof: 113.48


5-Year-6-Month Bourbon Finished In Madeira Casks
MADB-1: Short for Madeira Bourbon
Proof: 112.68



5-Year Bourbon Whiskey
IRT-35: Short for Indiana Rye in Tennessee
Mashbill: 60% Corn, 36% Rye, 4% Malted Barely
Distilled In: Indiana
Proof: 117.32

RIO-267 6-Year Orgin Series Rye
Mashbill: 75% Corn, 21% Rye, 4% Malted Barley 
Distilled In: Distilled in Indiana and aged in Frankfort, Kentucky
Proof: 114.78


RIO-202 Origin Series "Corn"
Mashbill: 75% Corn, 21% Rye, 4% Malted Barley
Distilled In: Distilled in Indiana and aged in Frankfort, Kentucky
Proof: 115.52


RIO-267 Origin Series "Barley"
Mashbill: 75% Corn, 21% Rye, 4% Malted Barley
Distilled In: Distilled in Indiana and aged in Frankfort, Kentucky
Proof: 113.62