Original Case Trimmer | Outside Neck Turner | Neck Reamers | Original Case Trimmer Collets .223/308 brass collet #1 with .280 pilot. Ya, I know you likely don't load 7mm rounds (a few do), but I will make you one pilot of your choice/size to fit this trimmer when buying this trimmer. $40. FTF Milwaukie. I just discovered that the collet works for 300 win mag, 7mm mag, etc.