RE ww primers, if they are brass color they are soft. If silver they are some of the hardest out there...
TI pin... first time you pierce a primer you have a really expensive paperweight... FWIW.
The issue can be as simple as too light of a trigger. Anything 3.5 pounds or so or less, thats not 2 stage, generally speaking, can give issues.
And some of those are related totally to how the gun is held, how it recoils and how you hold/pull/reset the trigger...
I was using the older manufacture silver colored primers, I won't use the gold colored ones.