[thackney]

then you need to make everything else the same. ONLY compare the caliber sizes.

No, my point is just the opposite. There are more important considerations than the caliber.

[Svartalfiar]

No, my point is just the opposite. There are more important considerations than the caliber.

And your point is true, but irrelevant. The comparison was about caliber size, not placement or bullet type or barrel length or revolver vs semi or anything else. The discussion was caliber vs caliber, in which case any other points are simply distracting from the main point.

[thackney]

Let me put it another way, and see if you agree.

The original poster was a vehicle gun, not a conceal carry. Let's assume they like the fit and feel of a full size Glock. In recommending a weapon, would you choose a 15 round G31 in 357 Mag, or a 10 round G37 in 45 ACP?

Diameter is not more important than speed when it comes to bullets. I argue that in this case, more speed and smaller diameter results in a better personal defense weapon.

Also, more holes are more important than 5/hundreds of a inch difference in the bullet diameter.