Lil gun can be very cranky and why I sold it at the range. After literally 1000's and 1000's of rounds on ground squirrels 1680 is supreme in my book and it fills the case nicely. I use standard small win primers as well and never an issue with either. Case life is beyond what I expected using the neck sizing method. I shoot both the K Hornet and standard Hornet with equal accuracy from a CZ and Ruger 77. My little Ruger has over 7000 rds now and still shoots tight groups..