R.E.A.L. Rifling Engaged At Loading is a mold you purchase made by LEE MOLDS. There are two sizes for each caliber. In the .50 caliber they are a 280 & 320 grain. I was shooting the 320 grain. In the .54 caliber they are 300 & 380 grain. As John said, they do look like a trash can with ribs. You fill the grooves of the ribs with a lube and once you pop them into the bore they load pretty easy. You can shoot them with and without a wad. I wanted to see what would be most accurate here as I was looking for a walking around rifle load. Normally they are pretty accurate. Although I have found at the longer distances, they start to loose their accuracy.