Lennyjoe
Member
Quick question, is the brass you are using new or fired from a different gun? Reason I ask is cause its better to neck size brass that's been fireformed to your chamber. If it's new I would suggest full size for the first time and then neck size after.I neck sized 50 , and 20 were full length sized
If it's fired from another gun and you neck sized it you might have issues with chambering the rounds.