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April 9, 2015
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http://www.alliantpowder.com/products/powder/power_pro_300.aspx
I have enjoyed reloading with Alliant's Power-Pro 300-MP in both .357 Mag and .44 Mag so I figured I would give it a try in the .357 Maximum/Super Mag cartridge.
So Here is the data for those that are interested. at 21.5 grains cases were just starting to get a little sticky.
Set: 59 Created: 06/29/15 11:18 AM Description: dan Wesson 357 super mag 10" barrel Notes 1: 21.5 gr mp-300 CCI 550 SPM Rem brass Notes 2: 180 gr Hornady XTP 1.8925" oal Distance to Chrono(FT): 10.00 Ballistic Coefficient: 1.000 Bullet Weight(gr): 180.00 Temp: 72 °F BP: 29.94 inHg Shots: # FPS / FT-LBS 5 1490 / 887 4 1546 / 955 3 1576 / 993 2 1594 / 1016 1 1532 / 938 Average: 1547.6 FPS SD: 40.4 FPS Min: 1490 FPS Max: 1594 FPS Spread: 104 FPS True MV: 1549 FPS *Primers were fine but the cases were a little sticky -------------------------------------------- Set: 58 Created: 06/29/15 11:15 AM Description: dan Wesson 357 super mag 10" barrel Notes 1: 21 gr mp-300 CCI 550 SPM Rem brass Notes 2: 180 gr Hornady XTP 1.8925" oal Distance to Chrono(FT): 10.00 Ballistic Coefficient: 1.000 Bullet Weight(gr): 180.00 Temp: N/A °F BP: N/A inHg Shots: # FPS / FT-LBS 5 1557 / 969 4 1566 / 980 3 1481 / 877 2 1521 / 925 1 1546 / 955 Average: 1534.2 FPS SD: 34.2 FPS Min: 1481 FPS Max: 1566 FPS Spread: 85 FPS True MV: 1535 FPS *No Pressure signs, all good -------------------------------------------- Set: 57 Created: 06/29/15 11:13 AM Description: dan Wesson 357 super mag 10" barrel Notes 1: 20 gr mp-300 CCI 550 SPM Rem brass Notes 2: 180 gr Hornady XTP 1.8925" oal Distance to Chrono(FT): 10.00 Ballistic Coefficient: 1.000 Bullet Weight(gr): 180.00 Temp: 70 °F BP: 29.95 inHg Shots: # FPS / FT-LBS 5 1481 / 877 4 1450 / 840 3 1448 / 838 2 1455 / 846 1 1411 / 796 Average: 1449.0 FPS SD: 25.0 FPS Min: 1411 FPS Max: 1481 FPS Spread: 70 FPS True MV: 1450 FPS No pressure signs primers and cases are fine. -------------------------------------------- Set: 56 Created: 06/29/15 11:10 AM Description: dan Wesson 357 super mag 10" barrel Notes 1: 19 gr mp-300 CCI 550 SPM Rem brass Notes 2: 180 gr Hornady XTP 1.8925" oal Distance to Chrono(FT): 10.00 Ballistic Coefficient: 1.000 Bullet Weight(gr): 180.00 Temp: 70 °F BP: 29.95 inHg Shots: # FPS / FT-LBS 5 1417 / 803 4 1398 / 781 3 1412 / 797 2 1368 / 748 1 1388 / 770 Average: 1396.6 FPS SD: 19.7 FPS Min: 1368 FPS Max: 1417 FPS Spread: 49 FPS True MV: 1398 FPS -------------------------------------------- Set: 55 Created: 06/29/15 11:08 AM Description: dan Wesson 357 super mag 10" barrel Notes 1: 19 gr mp-300 CCI 550 SPM Jamison Notes 2: 180 gr Hornady XTP 1.8925" oal Distance to Chrono(FT): 10.00 Ballistic Coefficient: 1.000 Bullet Weight(gr): 180.00 Temp: 70 °F BP: 29.95 inHg Shots: # FPS / FT-LBS 5 1308 / 684 4 1291 / 666 3 1249 / 624 2 1347 / 725 1 1355 / 734 Average: 1310.0 FPS SD: 43.2 FPS Min: 1249 FPS Max: 1355 FPS Spread: 106 FPS True MV: 1311 FPS
“We cannot but pity the boy who has never fired a gun; he is no more
humane, while his education has been sadly neglected.”
-Henry David Thoreau
“When some of my friends have asked me anxiously about their boys, whether
they should let them hunt, I have answered, yes – remembering that it was
one of the best parts of my education – *make* them hunters.”
-Henry David Thoreau
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January 24, 2009
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This is good info, thanks for taking the time to gather & post this data!
DWF Supporters
April 9, 2015
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I have some 170 grain and some 180 grain DAN WESSON Blue Box ammo I am going to shoot and get some data for as well. Then on to IMR4227 and AA1680. Then maybe experiment with some others like Lil Gun have read about Lil' Gun burning so hot it can erode the forcing cone so I am a little reluctant to go Lil' Gun.
“We cannot but pity the boy who has never fired a gun; he is no more
humane, while his education has been sadly neglected.”
-Henry David Thoreau
“When some of my friends have asked me anxiously about their boys, whether
they should let them hunt, I have answered, yes – remembering that it was
one of the best parts of my education – *make* them hunters.”
-Henry David Thoreau
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