Why is my Hornady 6.5 Creedmoor brass cracking/scratching on the shoulder

Did i ruin my brass?

Reloading « Daily Bulletin

Did i ruin my brass?

Stainless steel media

6mm and 6.5 Creedmoor Precision Ammo Reloading - RifleShooter

Buckling brass below the shoulder - Is this from too much lube? Happening even when only using hornady unique on bottom half of the case. Can't get proper shoulder bump without this

Precision Rifled Ordnance

Machine Gun Brass Resizing Woes

Brass Accuracy After Number of Firings

Neck/ Shoulder cracking question

6.5 creedmoor mushroomed at shoulder

Why is my Hornady 6.5 Creedmoor brass cracking/scratching on the shoulder

6.5 Creedmoor case damage