"Need" stopped being a relevant criteria about 1965.
Hey! I resemble that remark!
I fail to see the issue of how many rounds in the "belly". I never load more that 3 rounds in my rifles... And have never needed more than two.
I do readily admit that is excluding Alaska and Africa... (But if you're hunting dangerous game, one is likely to use more than a 7mm anyway...)
Grasshopper