"If somebody were planning to come to the event, and for some reason needed to get new magazines for their (guns) and they bought them on July 2 and hopped on an airplane and came here, they would technically be in violation as soon as they touched the ground," Proulx said.
The association's regional competition was the second event to be publicly canceled due to Colorado's new gun laws. Firearms maker Ruger recently announced they would move the planned 2013 Ruger Rimfire Challenge World Championships out of the state.
Proulx said another new law that requires background checks on all gun transfers could be problematic for shooters as well.
"If you borrow a gun from somebody, technically they've transferred it to you. And if you find yourself standing there with somebody else's gun that hasn't gone to a dealer and been through a background check, technically you are in violation, as far as I can tell," he said.
The state Attorney General's Office said it is reviewing the legal ramifications of the new laws.
Proulx admitted that some people might see the cancellation as more of a political statement, but he insisted that for him, it was a practical matter.
Hunters across the country, however, say they are boycotting Colorado because it is political.
Northwest Colorado hunting guide Chris Jurney said there have been cancellations and he expects more. Out-of-state hunters accounted for 15 percent of hunting licenses last year, with 86,000 compared with 489,000 for residents.
State tourism officials say they expect minimal impact because of the state's easy licensing program.