I got both and got both 357sig and 40s&w for the 27. I highly recommend people stay awy from the 357 sig round if you are a reloader. I have had a heck of a time getting the bullet not to push further into the case. Only way so far is to use a factory crimp die (40S&W) with a 9mm sleeve inside. to crimp enough so the bullet doesn't move. 40Cal is one caliber you do not want to play around with when it comes to seating.