Swifty Morgan
New member
I decided to try BE-86 for 10mm rounds. I'm using Speer GDHP 180-grain bullets.
I could not find a recipe, so I decided to start with Alliant's BE-86 recipe for Federal 180-grain JHP.
The Federal bullet is 0.637" long. The GDHP is 0.630" long. I am keeping the OAL at 1.250". That tells me the cartridge volume will be bigger with GDHP bullets, presumably reducing pressure and velocity. Does that sound correct?
I dropped back 0.4 grains from the Alliant recipe, to 7.8 grains. I got this result:
The spent casings look fine.
I am thinking I'll just increase the charge 0.2 grains at a time until I get to 1200 fps from this pistol. Seem reasonable?
I could not find a recipe, so I decided to start with Alliant's BE-86 recipe for Federal 180-grain JHP.
The Federal bullet is 0.637" long. The GDHP is 0.630" long. I am keeping the OAL at 1.250". That tells me the cartridge volume will be bigger with GDHP bullets, presumably reducing pressure and velocity. Does that sound correct?
I dropped back 0.4 grains from the Alliant recipe, to 7.8 grains. I got this result:
06 17 20 10mm 180 GDHP BE-86 Digital Link
Temperature: 79° F
Pressure: 30 in Hg
Bullet Weight: N/A
Number of Shots: 5
Minimum: 1074
Maximum: 1101
Spread: 27
Average: 1086
Standard Deviation: 10
Custom Attributes
Caliber 10 mm
Bullet Speer GDHP 180 grains
Brass Starline new
Powder BE-86
Charge 7.8 grains
OAL 1.250"
# Velocity Date
5 1093 6/17/20 8:08 PM
4 1086 6/17/20 8:08 PM
3 1101 6/17/20 8:08 PM
2 1074 6/17/20 8:08 PM
1 1078 6/17/20 8:08 PM
The spent casings look fine.
I am thinking I'll just increase the charge 0.2 grains at a time until I get to 1200 fps from this pistol. Seem reasonable?