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Rut Calculator

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The Story Behind The Rut Calculator

       Early in Jerry Everhart's hunting history, after meeting Fred Bear, he began keeping detailed field notes containing day, time, deer sightings, deer size & sex, weather, moon phase, shots taken, etc. Being an avid bow hunter, one of the mysteries he wanted to unravel was to predict the daytime movement of mature whitetail bucks. His background in Metrology (science of measurements) helped him to analyze his data.

Dispelling the Lunar Theory

By the mid 1980s, he determined the transition from nighttime only, to round-the-clock buck movement was consistently about seven days before peak breeding. The moon phase as the cause was a popular theory, but was dispelled since there was no correlation to his buck sighting data. If the rut were caused by the moon phase, it would happen at the same time at all locations from Canada to way down south.  However, we all know that is not the case

Discovering the Key Day

       By the mid 1990s, Jerry's 30 years of historical data determined that while mature buck daytime sightings may span the entire hunting season, the vast majority occur in about a seven day period. The 3-4 day Seek Stage begins on a Key Day, when daytime buck activity spikes sharply upward, as they travel to check scrapes and scent check does. This is followed by 3-4 days of the Chase Stage, as the large majority of does come into estrus. Jerry found that the Key Day is like turning on a light switch, and is the best time to harvest a mature buck (or any buck). He discovered the Key Day is triggered by the change in daylight, and that the Key Day changed at various geographic hunting locations, due to changes in latitude and longitude. It also changed from year to year since our calendar does not exactly coincide with the sun.

Finely Tuned for Dramatic Results

        By the early 2000s he fine-tuned a mathematical formula to select the days to hunt. Using this Rut Calculator, he harvested a Pope and Young caliber buck 12 out of 13 years with most of them in the Seek Stage, and a few of them in the Chase Stage. Jerry accomplished this on small properties, using compound and recurve bows, while shooting fingers.

Teaching Other Hunters 

       Jerry has been co-host of the long running Hunt Fish Journal podcast where he has taught hundreds of people to deer hunt using the Rut Calculator and Rut Functional hunting. The success of many hunters using the Rut Calculator can be heard on the Hunt Fish Journal's Rut Round Up podcasts. On the podcasts, you will also learn how properly utilizing mock scrapes, which will revolutionize your deer hunting.

Increasing Your Odds to See Mature Bucks

        This Calculator will not guarantee you will see mature bucks due to other factors such as pressure, but it significantly increases the odds that you will. All of us at Hunters Blend Coffee, have been purchasing and using Jerry's formula for years, and based on our success with it, have become convinced of its effectiveness, and are thrilled that Jerry has agreed to share it with us.

       IMPORTANT!! To maximize your odds, you must refrain from hunting your primary stand until the Key Days. GPS collar studies on deer have shown a 50% drop in deer sightings, after 12 hours of hunting a stand.  https://www.qdma.com/fast-can-stand-recover-hunting-pressure/

Don't Forget Your Trail & Scrape Scent

Disclaimer (AKA commonsense): Even though many people have successfully harvested mature buck using Jerry's method,  we cannot guarantee the hunting results of anyone using the whitetail Rut Calculator due to many variables such as the hunter's skill, pressure on the deer, scent control, deer population and buck-to-doe ratio. Some extreme southern geographic locations have a change in sunlight that is not typical to the majority of whitetail deer locations, and the genetic disposition of the deer in some of those locations are different, making exacting prediction difficult.