RE: reloading 300wsm
Well now..I had the same problem with mine..In a wheatherby vanguard..
I sent 3 boxs of winchester ammo back and they sent me 3 new boxs..
The factory stuff,could not be resized no matter what I did to it...The nickel
plated cases,I had no problem with...What case are you using?what make rifle?
Did you trim you cases to sammi specs? Was you die screwed down touching
the shell holder and then a tad bit more...Are you using the correct OAL length?