Large Rifle primers ignite propellant more reliably and consistently in extremely cold temperatures or weather at any condition. About size, Large rifle primers – 128 inches in height and. 212 inches in width. It works with all weather and fast delivery available at Armory Anchor. Are large Rifle Primer best for use targeting practice? Yes you can do target practice with these rifles. Large Rifle Primer cost approx $40 to $80 or it can be higher.