I have two Knight rifles, but do not have the Bighorn. One thing about Knight, they are usually very accurate rifles. The Bighorn uses the "bolt action" method that cocks the rifle. It uses the 209 primer with the plastic jacket and can shot 150 grains of powder. It has a single stage safety
I have the Vision Max 1, which is a "break-over" method to load the primer, and automatically cocks the rifle. It has a single stage button safety and the primer does not require the plastic jacket.
You should go to the Knight Rifles web sight - http://www.knightrifles.com