RTMiller
Member
I recently worked up a load for 9mm following the data on Hodgdon.com (see below). I put 4.4 grains of HP-38 under a Remington Bullet 9mm (355 Diameter) 124 Grain Full Metal Jacket (Federal No. 100 primers, COL was 1.095). After test firing at the range I noticed the primers were seriously flattened.
I thought maybe I had applied too tight a crimp so I reworked the load and reduced the crimp. The primers were still flattened when I tested the new load. Any ideas?
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Bullet Weight (Gr.) Manufacturer Powder Bullet Diam. C.O.L. Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure
125 GR. SIE FMJ Hodgdon HP-38 .355" 1.090" 4.4 1009 24,600 CUP 4.8 1088 28,800 CUP
I thought maybe I had applied too tight a crimp so I reworked the load and reduced the crimp. The primers were still flattened when I tested the new load. Any ideas?
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Bullet Weight (Gr.) Manufacturer Powder Bullet Diam. C.O.L. Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure
125 GR. SIE FMJ Hodgdon HP-38 .355" 1.090" 4.4 1009 24,600 CUP 4.8 1088 28,800 CUP