chrono test (info only) 9mm power pistol

[OutOfAmmo]

Created: 08-04-2016 12:46:31 PM
Description: sierra - power pistol 5.4 gn
Notes 1: wsp primer
Notes 2: oal 1.10 shot with S&W shield
Distance to Chrono (FT): 8.00
Ballistic Coefficient: 0.107
Bullet Weight (gr): 115.000
Altitude (FT): 0.0
Temp: 94 °F
BP: 29.97 inHG
Shots
# FPS FT-LBS PF
5 1211 374.54 139.26
4 1210 373.92 139.15
3 1209 373.31 139.04
2 1211 374.54 139.26
1 1159 343.07 133.29
Average: 1200.00
StdDev: 22.93
Min: 1159
Max: 1211
Spread: 52
True MV: 1210.22
Shots/sec: 0.71
Group Size (IN): 0.00

 

[Tboy]

That's a very consistent fps spread. Are you metering or weighing each powder drop?

 

[OutOfAmmo]

That's a very consistent fps spread. Are you metering or weighing each powder drop?

I hand dip and weigh each load as i do a work up then i use a drum powder drop after i find my Desired load.

 

[RG43]

What scale do you use? I was going to get a Frankford, but after seeing a video on how inconsistent it can be on readings, wound up with a Hornady Bench Scale. Haven't used it yet though. Just wondering what scales others are using.

 

[OutOfAmmo]

What scale do you use? I was going to get a Frankford, but after seeing a video on how inconsistent it can be on readings, wound up with a Hornady Bench Scale. Haven't used it yet though. Just wondering what scales others are using.

RCBS M500 and frankford Arsenal DS-750
and I zero them with a set of Lyman Scale Weight Checks every time I use them

 

[RG43]

Yeah, the DS-750 was the one I saw in the video that seemed to have a bad habit of going out of calibration, or maybe losing it's tare. Good to have another scale, like the RCBS, to check it with periodically, if the video I saw is typical of the Frankford scale.

 

[OutOfAmmo]

Yeah, the DS-750 was the one I saw in the video that seemed to have a bad habit of going out of calibration, or maybe losing it's tare. Good to have another scale, like the RCBS, to check it with periodically, if the video I saw is typical of the Frankford scale.

Just my opinion it’s a good idea to calibrate or check and recheck any scale as you use it ….also stay away from Air Conditioning vents or other things like talking that might influence the scales measuring ability

 

[RG43]

Yeah, the AC makes sense, and talking does too. Thanks for pointing those out.