The regulations for Colorado state’s muzzleloader season have been updated to determine that a minimum of .50 caliber is now required for hunting elk and moose with cone-shaped projectiles, and .54 caliber for any ball or round projectiles.

From the CPW website:

A. The following are legal methods of take for all species and seasons listed in this chapter, except as otherwise noted. Any method of take not listed herein shall be prohibited, except as otherwise provided by statute or these regulations: 
2. Muzzle-loading rifles and smoothbore muskets, provided the minimum caliber shall be forty (.40) for all big game except elk and moose when hunting with conical bullets and fifty (.50) caliber when hunting with round ball bullets.  The minimum caliber for elk and moose shall be fifty (.50) when hunting with conical bullets and fifty-four (.54) when hunting with round ball bullets. All muzzle-loading rifles and smoothbore muskets from forty (.40) caliber through fifty (.50) caliber must use a bullet of at least 170 grains in weight.  All muzzle-loading rifles and smoothbore muskets greater than fifty (.50) caliber must use bullets of at least 210 grains in weight.

These regulations took effect January 2018. Please visit the CPW regulations page for more details.

Colorado Muzzleloader Hunting Season

General Muzzleloader Season:

2019 Muzzleloader Season in Colorado:

Deer/Elk/Moose                    September 14 – 22

Plains Deer east of I-25       October 12 – 20

Pronghorn                              September 21 – 29

Please visit this link for more information.

Colorado Muzzleloader Hunting Season

An interactive version of the Big Game Regulations brochure, including bear, deer, elk and pronghorn, is available. Features include videos, publication search, links and magnification options for easy reading.
There is also a PDF version (10MB) available for your convenience. The Colorado Big Game Hunting Planner is an easy-to-read two-page summary of season dates, fees, and application dates and deadlines.
It can be saved and printed for easy reference as you plan your hunt during the Colorado Muzzleloader Hunting Season.

See the Plan Your Hunt page for useful information on organizing and planning your hunt, buying licenses and more!

Colorado Muzzleloader Hunting Season Dates

General Muzzleloader Seasons:

This information is subject to change, for more information visit:


Have Colorado Muzzleloader Hunting Season Questions?

Muzzleloader Hunting season is the best time to shoot the biggest deer before they are spooked by the regular gun season. If you are new to muzzleloaders or would like more information on your states muzzleloader hunting regulations make sure to give us a call. Knight Rifles is focused on promoting black powder hunting in all states across the USA and can help you determine when your particular states hunting season starts. If you have questions about Colorado Muzzleloader Hunting Season, please call us at 1-866-518-4181 or email us at

Knight Rifles, America’s Muzzleloader!

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