Changed my sparkplugs today

I changed the plugs today and found the guy that had it before had put some Denso Iridiums in. They didnt look too bad but the electrodes were kinda rounded off and the ground looked a little worn down not squared off like most plugs. Not sure if they come like that or not. Most of them had a gap of about .50 or slightly more. Im wondering if thered be any harmful effects from having those in. i bought the truck last august and this was the first time changing the plugs.

 

other than the gap being off....they shouldnt be a problem. the gap needs to be around .040 to .043.