EricP
09-20-2020, 08:02 PM
Dillon 650:
9mm:
S&S Casting 135 gr. Round Nose, Coated
Alliant Powder Pistol, 4.8-5.2 gr.:
Dillon sizing, Redding micrometer seating, Lee Factory Crimp:
CCI 500:
1.150":
See chart:
USPSA and general practice ammo:
Power Pistol has a pretty impressive flash.:
Coated lead bullets need more case expansion then the jacketed Precision Delta bullets that I have used for years. Lack of data on 135 gr. bullets:
Knocks down steel with authority.:
As mentioned above, there isn't a lot of published data on 135 gr. bullets in 9mm. I averaged 124 and 147 data, compared it to a spreadsheet I found on Brian Enos, and used a fairly forgiving powder. No pressure signs were encountered. I would say that this is a pretty warm load at 5.2 gr. and hotter than I was expecting.
60720
Power Pistol - 5.0 gr.
Max
1092
Min
1058
Average
1075.4
StDev
10.47960983
Ex Spd
34
Power Pistol - 5.2 gr
Max
1107
Min
1084
Average
1099.2
StDev
6.713171133
Ex Spd
23
* Chrono data - 10 round strings
I loaded 200 rounds for a USPSA match on Saturday at a reduced load of 4.8 gr. I don't have chronograph data on that. The trend line on the chart above says it should be about 1050 fps. This is still ~125 fps faster than necessary for minor power factor, but I won't have time to chronograph a new load before Area 7 this coming week. I will not have any concerns about the chrono stage.
Further load development is necessary.
9mm:
S&S Casting 135 gr. Round Nose, Coated
Alliant Powder Pistol, 4.8-5.2 gr.:
Dillon sizing, Redding micrometer seating, Lee Factory Crimp:
CCI 500:
1.150":
See chart:
USPSA and general practice ammo:
Power Pistol has a pretty impressive flash.:
Coated lead bullets need more case expansion then the jacketed Precision Delta bullets that I have used for years. Lack of data on 135 gr. bullets:
Knocks down steel with authority.:
As mentioned above, there isn't a lot of published data on 135 gr. bullets in 9mm. I averaged 124 and 147 data, compared it to a spreadsheet I found on Brian Enos, and used a fairly forgiving powder. No pressure signs were encountered. I would say that this is a pretty warm load at 5.2 gr. and hotter than I was expecting.
60720
Power Pistol - 5.0 gr.
Max
1092
Min
1058
Average
1075.4
StDev
10.47960983
Ex Spd
34
Power Pistol - 5.2 gr
Max
1107
Min
1084
Average
1099.2
StDev
6.713171133
Ex Spd
23
* Chrono data - 10 round strings
I loaded 200 rounds for a USPSA match on Saturday at a reduced load of 4.8 gr. I don't have chronograph data on that. The trend line on the chart above says it should be about 1050 fps. This is still ~125 fps faster than necessary for minor power factor, but I won't have time to chronograph a new load before Area 7 this coming week. I will not have any concerns about the chrono stage.
Further load development is necessary.