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Confirmed, It is NOT a ramped bolt. It's flat. I'm not sure if this will cause issues.
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I am not 100% sure this is the problem but I finished adding my newly built lower last week and took it out to finally put some down the range and I had a major issue 3 times with the actual casing being sheared and getting stuck in the barrel. I had Mixed ammo with tula federal and lawman 9mm and I was using 2 different magazines. One they provided, the metalform and the other was a C Products.
What was happening was I loaded the mixed rounds first and I don't know where it got stuck as far as what round, but the first magazine started out just fine then I had a jam, and I thought OK lets look into this. I pulled the bolt back and it looked like the round wouldn't go into the barrel. So I took a closer look after I pulled the magazine out and I noticed that there was a piece of brass stopping the next round from dropping in flush.
It took a little bit to clear it but I did. this is what it looked like after I pulled it out.
So I sprayed some lubricant on the feed ramp area thinking hey maybe its a ramp issue, and Loaded a mag with just federal and it shot fine except the last round did the same thing. (I am not 100% sure if I didn't load a NON-federal for my first round) Any way I loaded one with all mismatch rounds mostly tula and sure enough it happened again. This time the round that stuck looked like it was bulging at the same seam as the broken ones. the actual bullet was jammed into the casing. I will post a pic later of that.
I ran out of time. I will try it again in a week or so and see whats up, but that is my experience so far with my new Palmetto State 9mm build.