III. Firearm Information by Type
     E. Shotguns
        1. Shotshells and Loads
           b. Load weights, Shot Size, and Dram Equivalents
	
by Scot E. Heath (scot@hpfistu.fc.hp.com)

                               DRAM EQUIVALENT

This is an antiquated measure based on the amount in drams of black powder
it took to propel a certain mass of shot at a certain velocity.  Therefore,
dram equivalent is proportional to both velocity and shot mass.  The common
dram equivalents for different shot masses are:

           |   Shot   | Velocity |  Drams   |
   Gauge   |   oz.    |   fps.   |  Equiv.  |
___________|__________|__________|__________|
10 - 3-1/2"    2          1210      4-1/4
10 - 3-1/2"    2-1/4      1210      4-1/2
___________|__________|__________|__________|

12 - 2-3/4"    1          1180      2-3/4
12 - 2-3/4"    1          1290      3-1/4

12 - 2-3/4"    1-1/8      1145      2-3/4
12 - 2-3/4"    1-1/8      1200      3    
12 - 2-3/4"    1-1/8      1255      3-1/4
12 - 2-3/4"    1-1/8      1300      3-1/2

12 - 2-3/4"    1-1/4      1220      3-1/4
12 - 2-3/4"    1-1/4      1330      3-3/4

12 - 2-3/4"    1-1/2      1260      3-3/4
___________|__________|__________|__________|

12 - 3"        1-3/8      1295      3-3/4

12 - 3"        1-5/8      1280      4    

12 - 3"        1-7/8      1210      4    
___________|__________|__________|__________|

16 - 2-3/4"    1          1165      2-1/2

16 - 2-3/4"    1-1/8      1185      2-3/4
16 - 2-3/4"    1-1/8      1240      3    
16 - 2-3/4"    1-1/8      1295      3-1/4    

16 - 2-3/4"    1-1/4      1260      3-1/4
___________|__________|__________|__________|

20 - 2-3/4"      7/8      1210      2-1/2

20 - 2-3/4"    1          1165      2-1/2
20 - 2-3/4"    1          1220      2-3/4

20 - 2-3/4"    1-1/8      1175      2-3/4
___________|__________|__________|__________|

20 - 3"        1-3/16     1195      3-1/2

20 - 3"        1-1/4      1185      3
___________|__________|__________|__________|

28 - 2-3/4"      3/4      1200      2    
28 - 2-3/4"      3/4      1295      2-1/4    
___________|__________|__________|__________|