Power factor question for USPSA - The Firearms Forum

mongo · 11-17-2009, 08:41 PM

OK I am shooting in a local USPSA steel match this weekend and they are requiring a power factor no higher than 150. I am shooting 40 S&W. I am looking at loading a 155gr lead cast bullet using Hodgdon Clays and looking at a valocity around 850 to 900fps. Usinf the formula I get a PF between 131 and 139. is that right? There is no minimum bullet weight is there?

pickenup · 11-17-2009, 09:44 PM

131 to 139 is correct.

The only division that has a minimum bullet weight is "open" division, then the minimum is 112 grains if you are shooting "major" power factor. Since the minimum PF for shooting major is 165. With what you are loading, with your power factor, you will be shooting minor anyway. So you should be good to go.

Have fun, shoot fast, don't miss.

mongo · 11-18-2009, 05:25 AM

Thanks. Its 150 rounds if I dont miss.

11-17-2009, 08:41 PM	#1
mongo V.I.P. Member Join Date: Jun 2009 Location: South Eastern Virginia Posts: 84	Power factor question for USPSA OK I am shooting in a local USPSA steel match this weekend and they are requiring a power factor no higher than 150. I am shooting 40 S&W. I am looking at loading a 155gr lead cast bullet using Hodgdon Clays and looking at a valocity around 850 to 900fps. Usinf the formula I get a PF between 131 and 139. is that right? There is no minimum bullet weight is there? -->

11-17-2009, 09:44 PM	#2
pickenup Advanced Senior Member Join Date: Sep 2002 Location: Colorado Rocky Mountains Posts: 6,837	Re: Power factor question for USPSA 131 to 139 is correct. The only division that has a minimum bullet weight is "open" division, then the minimum is 112 grains if you are shooting "major" power factor. Since the minimum PF for shooting major is 165. With what you are loading, with your power factor, you will be shooting minor anyway. So you should be good to go. Have fun, shoot fast, don't miss. __________________ The gene pool needs chlorine

11-18-2009, 05:25 AM	#3
mongo V.I.P. Member Join Date: Jun 2009 Location: South Eastern Virginia Posts: 84	Re: Power factor question for USPSA Thanks. Its 150 rounds if I dont miss.