Prime Tube Loader Features The Forster Primer Tube Loader aligns primers anvil-side up and mates with the Primer Feed Tube for quick loading in the Co-Ax Primer Seater. The Primer Tube Loader aligns all primers with just a few flicks of the wrist. With a little practice you can go from the primer box to Primer Tube Loader to Primer Feed Tube in as little as eight seconds! Prime Tube Loader Specifications Forster Products Primer Tube Loader Red