Hard to find original 1960 The Mysteries of Shotgun Patterns, Dr. George G. Oberfell, Charles E. Thompson, 528 Pages in good condition, very technical manual. Some of the sections in this book include.

- List of Tables
- List of Figures
- Know your shotgun
- Know your know how
- Know more know how
- Game cookery
-Biblioagraphy and worth while Data

Some of the many Tables in this manual include

- Pellet distribution factor versus pattern efficiancy
-Patchiness of pattern Vs number of Pellets
- Reproducibility of Patterning test results
-Patchiness - of shot patterns produced by different pellet propelling devices
- Number of 5 inch Patches in 30 inchpatterns at 30 yard.

And Much much more, please see images of table of content for complete specifics.

This manual ships priority