I just received my Vinci last week. While getting familiar with it, I noticed that if the bolt action did not have good momentum sliding back, it stopped short like your second picture. I am a novice but I went shooting for the first time today with a tactical instructor and shot 75+ rounds with no issues at all. I shot slugs, 00 buck and birdshot.
My only issue is the advertised 3 in the mag plus 1 in chamber. With various brands, I could only load 2 in the mag. It was close but no cigar.
Anyone experience the same?