Collingwood was a strong believer in gunnery training and the Navy's gunnery school (HMS Excellent) was named after his ship at the battle of Cape St Vincent in 1797.
The then Commodore Nelson was single-handedly taking on half a dozen ships in the Spanish van to stop them legging it for Cadiz. Collingwood came to his aid by sailing slap through the middle of the Spanish fleet and gave a right shoeing to anyone in his way. All four Spanish ships captured (including the two by Nelson) had been fired into by Collingwood first. Nelson recorded Collingwood as pouring in broadsides from ranges as close as 10 feet - shoeing indeed.
At Trafalgar, Collingwood led the lee column of the British fleet into action (Nelson leading the other). Royal Sovereign was under fire for 25 to 30 minutes but held her fire as Collingwood wanted his first broadside to tell. It was fired at a range of just a few yards straight through the stern of the Spanish flagship, killed or wounded 400 men and dismounted 15 or so of her cannon.
So - old weapon system it might be, but bloody lethal in the hands of someone like Collingwood.....