bowhuntr09 Posted April 20, 2006 Share Posted April 20, 2006 Not trying to thread highjack, but since it was mentioned in this post and I am a newbie could someone explain the term "make major"? Link to comment Share on other sites More sharing options...
SteveZ Posted April 20, 2006 Share Posted April 20, 2006 since it was mentioned in this post and I am a newbie could someone explain the term "make major"? sure.....the term "make major" refers to achieving a specific "power factor". In IPSC/USPSA shooting, minor power factor is defined to be between 125 and 164.9999, major power factor is defined to be 165 and greater. The targets used in IPSC/USPSA shooting have scoring areas. For center A-zone hits, minor and major power factor both score the same points (5 points) but as you move away from the A-zone, the points awarded for major are greater than minor (e.g. C zone hit: major = 4 points, minor = 3 points). Lastly regarding "power factor" (PF). PF is defined as the bullet weight (in grains) x the bullet velocity (in feet per second) divided by 1000. Example: If your .40 S&W load shoots a 175-grain bullet at 1,000 feet per second…(175 grains times 1,000 feet per second = 175,0000. 175,000 divided by 1,000 = 175 "power factor"). Link to comment Share on other sites More sharing options...
bowhuntr09 Posted April 20, 2006 Author Share Posted April 20, 2006 Thanks! Link to comment Share on other sites More sharing options...
AzShooter Posted April 20, 2006 Share Posted April 20, 2006 Actually you calculate power factor by dividing 165000 / bullet weight for major and 125000 / bullet weight for minor. This will give you the speed you need with the weight bullet you are shooting. As an example 165000/230=717 125000/158=791 It's always best to add a little to your speed to guarantee you make the factor you want. Link to comment Share on other sites More sharing options...
bowhuntr09 Posted April 20, 2006 Author Share Posted April 20, 2006 Actually you calculate power factor by dividing 165000 / bullet weight for major and 125000 / bullet weight for minor. This will give you the speed you need with the weight bullet you are shooting.As an example 165000/230=717 125000/158=791 It's always best to add a little to your speed to guarantee you make the factor you want. Are everyones loads tested at a match to determine major or minor? Sorry for the dumb questions but I have never been to a match. Link to comment Share on other sites More sharing options...
Merlin Orr Posted April 20, 2006 Share Posted April 20, 2006 Very seldom at local matches - Nearly always at major matches..... Link to comment Share on other sites More sharing options...
rick458 Posted May 15, 2006 Share Posted May 15, 2006 When Did they back the Power Factor Down to 165? Way back in the day It used to be !75 or !80 .38 supers were blowing casae a lot I heard Link to comment Share on other sites More sharing options...
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