Weird coal reading 55vmax .223

Griffo13

Well-Known Member
started reloading a while back and now getting into the territory of understanding Coal. As much I’m as not really chasing perfection in my straight pull 223, it’s a good learning point.

With 62 grain fmj: 2.369 Coal and 2.027 Cbto

With v max 55grain: 2.240 coal and 1.847 cbto.

What’s confusing me is the vmax rounds are smaller than the standard spec of 2.260 Oal.

I couldn’t seem to push the round in further and checked a few times. Am I doing something wrong or is this just the way it is with vmax rounds due to their shape?

Thanks
 
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