Up until this point I have always fl sized for my 300 win mag. I was having some trouble with the die and did something stupid and screwed it up. I was wondering about neck sizing, read a little about it but would like a little more insight. From what i can find a belted case should be treated differently than a non belted case. Should I buy a new fl size and stay with that or give neck sizing a try? Maybe some pros and cons would help.