Next steps need some advice

I have to take that back - 6.8mm might do the trick. Here's the data from Silver State Armory

http://www.ssarmory.com/images/SSA6.8SPC_Drop_Table.pdf

Ok so that is why there is only two markings.....Fire is single shot and semi-auto in one setting.....Cause you have to pull trigger each time for single or semi-auto....[AR15][Pepsi]

Here is the info for COLORADO...

1. CEN TERFIRE RIFLES
a. Must be minimum of .24 caliber (6 mm).
b. Must have a minimum 16-inch barrel and be at least 26 inches long.
c. If semiautomatic, they can hold a maximum of six rounds in the magazine
and chamber combined.
d. Must use expanding bullets that weigh minimum 70 grains for deer,
pronghorn and bear, 85 grains for elk and moose, and have an impact
energy (at 100 yards) of 1,000-ft. pounds as rated by manufacturer.
e. It is illegal to hunt game birds, small-game mammals or furbearers with a
centerfire rifle larger than .23 caliber during regular rifle deer and elk seasons
west of I-25, without an unfilled deer or elk license for the season. A
small-game, furbearer or unfilled big-game license is required.