Thread: Brass length trimming question

I recently brought some peterson 280ai brass, it was all very uniform and all measured at 2.5190 or there abouts before firing.
I just deprimed and amp annealed and then sized with a Redding full length die and checked lengths, some were as long as 2.5520 is having to trim .75mm normal?

Unfortunately I didn’t measure any after they had been fired before I sized them. I thought maybe the die could have been stretching them with the button on the up stroke? Especially after being annealed and a bit softer?

I will measure some before and after firing next time.

Only some are long, maybe 75% need trimming, maybe 20% need up to 30 thou taking off.

Just wanting to know if I’m worried about nothing!
Cheers