Crossbows are allowed in Texas during gun season, which is where they belong. I would imagine a lot of us could get proficient with a sling and a rock if we had a lot of time on our hands. And I'm sure people could use old guns made before they put rifleing in the barrels. Equipment changes and improves. Guns are different than bows. Crossbows are different than bows. Crossbows are different than guns but closer in their manner of use.