Mark and Digger Push the Limits with a 140 Proof Moonshine Experiment on Moonshiners

In a daring new chapter of Moonshiners, aired on September 23, 2025, legendary shiners Mark Ramsey and Digger Manes embarked on an ambitious challenge to craft a 140 proof corn liquor for a high-paying client, shaking up their traditional methods with innovative still modifications. The client, eager to soak cherries in a potent spirit without diluting the alcohol content, offered $140 per gallon for 100 gallons—a lucrative but daunting order requiring 20 runs with their existing equipment. Faced with the challenge of maintaining the corn flavor while hitting the high proof, Mark and Digger engineered a double-thump keg system, risking back pressure and equipment failure to meet the demand. This high-stakes experiment, showcased in the latest episode, underscores their relentless pursuit of perfection in the clandestine world of moonshining.

Mark and Digger, veterans of the Moonshiners series since its 2011 debut, are no strangers to pushing boundaries in their Appalachian craft. Operating in the backwoods of Tennessee, they’ve built a reputation for producing high-quality moonshine while navigating legal gray areas and equipment limitations. The client’s request for 140 proof liquor—far above the standard 100 proof—posed a unique challenge. As Digger explained, “If you soak cherries in 100 proof, the juice waters it down to about 60 proof. This guy wants cherries that pack a punch.” The order, totaling $14,000 for 100 gallons, demanded a significant increase in production capacity and alcohol by volume (ABV), prompting the duo to rethink their approach.

The challenge lay in balancing proof and flavor. Column stills, which can boost proof, strip away the corn taste the client craved, as noted in a TV Insider recap. Instead, Mark proposed a novel solution: a double-thump keg with eight cooling pipes to condense alcohol vapors twice, preserving flavor while concentrating the proof. “We need column still effects but gotta keep that corn flavor,” Mark said, sketching out the design. The system involved vapor passing through two chambers, each with four cold-water pipes, to purify the alcohol without losing its character. However, the innovation carried risks. “I’m worried about back pressure blowing the cap off,” Digger cautioned, referencing the potential for the modified still to malfunction under the strain of trapped steam.

To maximize the mash’s ABV, Mark and Digger tweaked their recipe, increasing corn for flavor and adding extra sugar—nine pounds per 50 gallons instead of six—to boost fermentation. “We’re taking this mash from 12% to 18–19% ABV,” Mark explained, grinding the corn to a heavy grit for optimal consistency. They added a pound and a half of yeast to kickstart fermentation, ensuring the mash would “take off like a rocket,” as Digger put it. The fortified mash, rich in sugars, was designed to produce more high-proof liquor on the first run, critical for meeting the client’s volume demands profitably.

As the still fired up, tension mounted. The double-thump keg, a first for the duo, was untested, and the risk of overpressurization loomed. “We might back pressure ourselves right out of the building,” Mark warned, monitoring the drain to prevent thump juice buildup. Kelly, a trusted crew member, assisted in assembling the keg, while Beazell focused on perfecting the mash. The first signs of success came as the still began to “spit,” with alcohol vapor condensing into liquid. Digger performed the shake test, observing “crog eye bubbles” that signaled high proof. “It’s promising,” he said, sniffing the corn-rich aroma. The proof test revealed an impressive 168 proof, exceeding the client’s 140 proof target while retaining the desired flavor—a triumph for the experimental setup.

Fans on X celebrated the duo’s ingenuity, with one posting, “Mark and Digger building that thump keg is next-level moonshining.” However, the process wasn’t without hurdles. The high-proof run required constant monitoring to avoid equipment failure, and the 20 runs needed for 100 gallons strained their resources. “Everybody else’ll be copying this if it works,” Kelly quipped, recognizing the potential industry impact. The episode, reviewed by Collider, highlighted the financial stakes, with the $14,000 payout offering a significant boost to their operation, which has faced legal scrutiny and rising grain costs, as noted in a 2024 Forbes report on moonshine economics.

The experiment reflects the broader challenges of moonshining, a craft rooted in Appalachian tradition but fraught with risks, from equipment mishaps to law enforcement raids. Mark and Digger’s willingness to innovate, despite the potential for catastrophic failure, underscores their expertise and determination. Their success in hitting 168 proof while preserving corn flavor positions them as pioneers, potentially influencing other shiners to adopt similar techniques. As Moonshiners continues to captivate audiences with its blend of technical prowess and backwoods drama, Mark and Digger’s latest gamble proves that in the high-stakes world of moonshine, bold risks can yield big rewards—or spectacular failures.