Tikka T3 Receiver Removal

[FLIGHT762]

As a general rule, you can disregard the head space gauge(s) somewhat on belted magnums. Set up your dies so you are sizing to the shoulder datum, ignore the belt, and enjoy the rifle.
If it ain't broke, don't fix it.

This^^^^^^^^^^^^^^. Measure the case head to shoulder datum line on your fired cases and set up your sizing die to bump the shoulder back .001"-.002" from your fired cases. Be sure to deprime the fired cases cases to be measured, a cratered fired primer will give false readings.

[In My Cold Dead Hands]

what are your thoughts of neck sizing only vs pushing the shoulder back with a FL sizing die?

[FLIGHT762]

You can get away with a few neck only sizings, but eventually, you will have to F/L size. I don't N/O size more than 3-4 time before F/L sizing and when I do, I make very clear notes on how many times the cases have been N/O sized.

The first time you have to beat open the bolt when you've stuck a N/O sized case in the chamber will convince you.

I F/L size nearly all of the time. A properly set up F/L die, bumping the shoulders minimally (.001"-.002") will give you long brass life.