Chapo Posted January 31, 2023 Share Posted January 31, 2023 I was at the range today and experienced something unexpected. Less powder in the round game me higher power factor than those with more powder. - 124g CMJ Everglades bullet with 7.7gr HS6 resulted in PF 169 (OAL 1.55") - 124g CMJ Everglades bullet with 7.8gr HS6 resulted in PF 167.9 (OAL 1.55") - 124g CMJ Everglades bullet with 7.9gr HS6 resulted in PF 168.7 (OAL 1.55") Is this normal? Or did I fouled somewhere? Link to comment Share on other sites More sharing options...
36873687 Posted January 31, 2023 Share Posted January 31, 2023 Not all same head stamp brass Link to comment Share on other sites More sharing options...
Chapo Posted January 31, 2023 Author Share Posted January 31, 2023 Ok, My brass was mixed. Link to comment Share on other sites More sharing options...
FTP_Shooting_Sports Posted February 3, 2023 Share Posted February 3, 2023 Did you actually weigh each charge in each case or just set the press? There variance on a lot of presses can easly be +- 2 tenths of a grain. Also, different brass as mentioned can slightly affect power factor. I have no loaded HS6 but I have found that some other powders will really just max out in the case (3N38 for example). As the case gets full, at some point, the additional powder added makes very little difference in PF. Link to comment Share on other sites More sharing options...
Chapo Posted February 4, 2023 Author Share Posted February 4, 2023 Thanks. I did measure each with an Hornady auto measure but my cases were mixed. Link to comment Share on other sites More sharing options...
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