Yup that is exactly what it is. I have only shot a few of them as they are about $2 a round. But when shot into a gallon of water it is amazing. The back of the gallon container is pretty well blown out. I compared it to Corbon +P's and there was a big differance. Corbon puts a split down the back, while Extremes blow it out. I also have the CTJ's in the shotty. It basically is a 45 round in a 12 gauge shell.

Here is a pic with them. If you look at the 12 gauge shell you can see the 45 round inside.