You're certainly not going to bend a ram on a press pulling bullets....... I've pulled a lot of bullets on my Rockchucker (duds turned in at the range), and never hurt anything. For protecting the 7/8 x 14 threads, I've used a piece of leather with a hole cut in it for the nose of the pliers to stick through. I've also cut off the plastic sleeve from a 12 gauge shotgun shell and used that, since it just fits the hole.
Doing it this way you salvage the powder, if it's a known entity, the case and primer. The only thing damaged and lost is the bullet, which becomes a new bullet in short order.
I'm still thinking about that bending the ram part........?? The ram is designed to withstand pressure measured in tons, so how does pulling a bullet from the neck of a case factor into damaging the ram? Just wondering if there's something I'm missing, since I've pulled a lot of bullets with this method, and the only ram I ever damaged was swaging bullets, and it was easily fixed. Tremendous pressures are produced when swaging, but very little when pulling bullets... Just saying.....
Hope this helps.
Fred