Pistol Size & Weight

TFB TV (YouTube Channel) has a couple of terrific videos comparing 9mm and 380 pistols with regards to capacity vs size and weight. This is my modified version of their spreadsheet where I weighted capacity on a diminishing returns basis (see explanation video below). If you mouse over the upper right corner of the spreadsheets, you can open in Google Sheets.

Handguns - Rounds per size and weight

Gun Size Spreadsheets Weighted Rounds

Handguns - Round Count Opportunity Cost

Rounds Op Cost

The average gunfight involves less than 4 rounds fired. Many threats are repelled by simply brandishing a firearm. So in my weighting I favor the first 3 rounds of capacity and then give diminishing value for each additional round thereafter as follows:

1 - 1

2 - 2

3 - 3

4 - 3.98

5 - 4.94

6 - 5.88

7 - 6.8

8 - 7.7

9 - 8.58

10 - 9.43

11 - 10.23

12 - 10.98

13 - 11.68

14 - 12.33

15 - 12.93

16 - 13.48

17 - 13.98

To put the size and weight values on approximately equal footing, I multiplied the Weighted Rounds/oz by three when calculating the Weighted Composite.