I couldn't find anything in print about the length of the rammers and sponge, but according to my notes I took a Shiloh, they were aprox 24" longer than the barrel. The rammer had the sponge on the opposite end, and the worm had a brush on the opposite end. I don't think there were any hard specs on these implements as I've seen many variations.
The hand spikes on a full scale 12 pounder are 4 ft long.
The balls stacked in pyramid was strictly an inspection/exhibition protocol, and these were solid shot. In the field artillery shells were mostly used and they were stored in the ammo chest. Artillery shells were banded to a wooden sub base to orient the fuse towards the muzzle. The flames licked around the sub base and the shell to ignite the fuse from the front end, otherwise if it would explode from the propellant charge.