I've used a lot of "pull down" powder, a few hundred "pull down" bullets, but no "pull down" brass. I would suspect that marks on the bullets are from the tools used to load and to pull them.
The pull down powder I used had a "civilian" equivalent so no problems finding load data. I have used a lot of "range brass" and "once fired" brass, in nearly all the calibers I reload, especially 45 ACP, 9mm, 30-06, and 7.61x51/308.
I started reloading with range pickups from the local police range (in 1969) and got several hundred .38 Special cases and had zero problems reloading them.