



Loads Per Pound of Powder 
Weight / Length Equivalents  Conversion Factors  
Powder 
Loads  Powder 
Loads 
Powder  Loads  
5 gr.  =  1400  40 gr.  =  175  75 gr.  =  93  7000 Grains  =  1 Pound  Pounds x  7000  =  Grains  
10 gr.  =  700  45 gr.  =  155  80 gr.  =  87  437.5 Grains  =  1 Ounce  Ounces x  437.5  =  Grains  
15 gr.  =  466  50 gr.  =  140  85 gr.  =  82  15.43 Grains  =  1 Gram  Grains x  .00229  =  Ounces  
20 gr.  =  350  55 gr.  =  127  90 gr.  =  77  25.4 Millimeters  =  1 Inch  Grams x  15.4324  =  Grains  
25 gr.  =  280  60 gr.  =  116  95 gr.  =  73  Grains x  .0648  =  Grams  
30 gr.  =  233  65 gr.  =  107  100 gr.  =  70  Inches x  25.4  =  Millimeters  
35 gr.  =  200  70 gr.  =  100  Millimeters x  .03937  =  Inches  

Common Abbreviations 



ACP  >  Automatic Colt Pistol  HPBT  >  Hollow Point Boat Tail  SAA  >  Single Action Army  
AV  >  Average Velocity  HS  >  Hydra Shok HP (Federal)  SD  >  Sectional Density or  
BB  >  Bevel Base  J  >  Jacketed Bullet  Standard Deviation  
BBWC  >  Bevel Base Wadcutter  JHC  >  Jacketed Hollow  SIL  >  Silhouette  
BC  >  Ballistic Coefficient  Core/Cavity  SJ  >  Short Jacket  
BP  >  Bullet Pull  JFP  >  Jacketed Flat Point  SP  >  Spire Point / Soft Point  
BPS  >  Black Powder Silhouette  JHP  >  Jacketed Hollow Point  SWC  >  SemiWadcutter  
BR  >  Bench Rest  KEITH  >  Elmer Keith Bullet Design  SSP  >  Single Shot Pistol  
BT  >  Boat Tail  L/LB  >  Lead Bullet  TC  >  Truncated Cone  
CAV  >  Cavalry  LBT  >  Lead Bullet Technology  T/C  >  Thompson Center Arms  
CB  >  Cast Bullet  LD  >  Loading Density  TMJ  >  Total Metal Jacket  
CF  >  Center Fire  LOS  >  Line of Sight  TOF  >  Time of Flight  
CV  >  Coefficient of Variation  LRN  >  Lead Round Nose  WC  >  Wadcutter  
CUP  >  Copper Units of Pressure  MC  >  Metal Case  WCF  >  Winchester Center Fire  
DCM  >  Dir. Civilian Marksmanship  ME  >  Muzzle Energy  WLN  >  Wide Long Nose (LBT  
FMJ  >  Full Metal Jacket  MOA  >  Minute of Angle  bullet design)  
FN  >  Flat Nose  MR  >  Mean Radius  XTP  >  Extreme Terminal  
FP  >  Flat Point  MV  >  Muzzle Velocity  Performance, (Hornady jacketed  
FPS  >  Feet Per Second  NSS  NorthSouth Skirmish  hollow point)  
GC  >  Gas Check  OAL  >  Over All Length  
HBWC  >  Hollow Base Wadcutter  PSI  >  Pounds Per Square Inch  
HJ  >  Half Jacket  R/RB  >  Round Ball  
HP  >  Hollow Point  RF  >  Rim Fire  
RN  >  Round Nose  

Associations / Organizations Abbreviations 
Is Your Range In Meters Or Yards?  
CBA  >  Cast Bullet Association  Multiply: 
Abbreviations 

CCA  >  Colt Collectors Association  Yards  By  0.9144  To get  Meters 
FPS 
>  Feet Per Second  
IHMSA  >  International Handgun Metallic Silhouette Association  Meters  By  1.094  To get  Yards 
MPS 
>  Meters Per Second  
IPSC  >  International Practical Shooting Association  FPS  By  0.3048  To get  MPS 
MPH 
>  Miles Per Hour  
NBRSA  >  National Bench Rest Shooters Association  MPS  By  3.281  To get  FPS 


NRA  >  National Rifle Association  FPS  By  0.6818  To get  MPH  
NRMA  >  National Reloading Manufacturers' Association  
NSSF  >  National Shooting Sports Foundation  
SAAMI  >  Small Arms and Ammunition Manufacturers Institute  
SASS  >  Single Action Shooters Society  
USPSA  >  United States Practical Shooting Association 
Muzzle Energy  Momentum In Pound Seconds  
Weight of bullet (in grains) x velocity (in foot seconds) x velocity x 0.000002218 = energy in foot pounds.  *  Multiply the bullet weight in grains by the velocity at impact. Divide the product by 226,000 ( a gravimetric Constant).  
Example: 100 grain bullet at 3000 ft/seconds > 100 x 3000 x  
3000 x 0.000002218 = 1996 foot pounds energy.  *  Example: 45 caliber 240 grain bullet 200 yard velocity of 985 fps. 240 x 985 = 236400 divided by 226,000 = 1.046 poundseconds momentum.  


Standard Deviation  Coefficient of Variation  
Example: 5 shot string, velocity's of 1020, 980, 1000, 1015, 985. First, add the five velocity's and take their average: 1020, 980, 1000, 1015, 985  *  The coefficient of Variation shows the standard deviation as a percent of the average and is a more reliable measure of a loads consistency.  
The five velocity's add up to 5000 fps. Their average is 1,000 fps (5000/5) Next subtract the average from each velocity and square the difference. Add up the squared differences (1250) and divide by 4 (the number of velocity's minus one).  * 
The smaller the CV the less variation there is "relative to the average". Divide the average into the standard deviation and multiply the result by 100. From the above example of standard deviation: The S.D. is 17.68. The average is 1000. 

Always divide the number of measurements minus one. The result is 312.5 or 17.68: (17.68 x 17.68 = 312.5).  *  Example: 17.68 (SD) divided by 1000 (velocity) = 0.01768 x 100 = 1.768. The CV is 1.768.  





