The 120-123 class won’t group what is going on

[Dt219]

I’m going to find coal for the 123 Sierra today at work I will post it also. I know I just assumed but my loads had to be in the lands with the 120. Again I’d have to measure a loaded round but the dummy I made last night does appear to sit further away from the magazine than the ones I been shooting. Those 120s are pushed way back into the case