Nonsense. Total nonsense. First, yes you can pull them with no marks, and secondly, even if they were marked up slightly that's not going to affect anything. It's also not necessarily right at the ogive to bearing surface that they grab, depending on how the bullet is seated. The ogive is the curved area, collet pullers grab on the bearing surface.
There's a non trivial learning curve to using them correctly, but when you do they don't molest your bullets at all.
I've tested this exact thing, intentionally gooning bullets to the point of obvious stupidity and excessive clamping force. I couldn't find a difference on paper.
No ... no nonsense.
I never even spoke of marks -but rest assured it CAN (at least was the case in my 200 2nd gen MKs... very long pointy bullets) change the bearing surface length and ogive placement of bullet.
In my case, the really changed the contours of bullets.
Using a Sinclair style bullet comparator, I found that it indeed changed the position of the datum anywhere between 0.005 and 0.010.
Using a different/simpler measurement method of 2 Hornady comparators on a digital calipers confirmed it.
I know this because I sort all of my projectiles within 0.001 using three measurements....
(1) base to ogive (Sinclair tool method),
(2) bearing surface length (2 Hornady 30 cal comparators),
(3) finally I will also sort using one 30 cal Hornady comparator and one 17 cal comparator. The intent here is to check for consistency in the distance from the tail ogive to the closer to the tip of the bullet.
As for difference on paper ? ... well maybe there is maybe there isn't.
I've never done any such test with them.
If they were pulled with the collet, I would chuck them the "fouler/reject" pile and use them in a warmup/blow off rounds for the start of a F-class tournament.