Hi, I recently bought a new packet of Winchester 32/20 cartridges; I haven't fired any of them, but decided to pull a few down with the intention of reloading the bullets over a light charge of Trailboss.
The bullets have a hollowed base and in 9 of the 10 that I pulled, the edge of the base was deformed by what looks like an angled hammer blow to its edge or possibly swaging damage.
I am not even going to bother firing them but will replace the bullets.
I just wanted to post this in case others have been getting bad accuracy from this stuff and blaming their rifles... perhaps I got unlucky.

Gaz,

Are you certain that the damage that you are seeing is not an artifact of your bullet pulling process? How did you pull them?

I often see damage to the base of soft lead bullets when I use a kinetic bullet puller unless I watch the progress of the bullet, and tap the puller gently when the bullet is about to separate from the cartridge case.

My apologies to you if I am way off base with this suggestion.

Did you see the attached photo? There is no way I could have caused damage of that extent.
I used an RCBS inertia puller which has a soft pad for the bullet to land on. I am not exactly new to hand-loading.

These were made by Winchester. It looks more like pressure damage than cast damage. I think they might be swaged? Not great quality control!
They cost $Au 250 per 100 btw.