Got a new chronograph!

[tulsadave2003]

Prochrono digital first results

9mm 124gr Precision Delta FMJ
Titegroup powder 4.0grains
Winchester small primers
OAL 1.10"
Brass:various mostly winchester or federal
Temperature: 84F
Pressure: 30.01 in
Humidity: 45%

Glock 34 with factory barrel
1:1090
2:1092
3:1082
4:1102
5:1107
6:1101
7:1077
8:1084
9:1081
10:1104
Hi: 1107 Low:1077 Av:1092 ES:30 SD:10
Meets IDPA power factor, the slowest speed for a 124gr bullet is 1009 so i'm well within "legal"

Glock 19 with Lone wolf barrel
1:1O42
2:1063
3:1030
4:1050
5:1031
6:1019
7:1032
8:1014
9:1032
10:1049
HI:1063 LOW:1014 AV:1036 ES:49 SD:14

Just for fun HI Point Carbine
1:1218
2:1190
3:1195
4:1183
5:1166
6:1177
7:1205
8:1176
9:1176
10:1187
HI:1218 Lo:1166 AV:1187 ES:52 SD:15

.223 will have to come another day almost unbearably windy outside!

 

[guns are dumb]

Did you use any sort of cover other than the screens that come with it and were you out in the sun when you took your readings?

I ask because I have a Shooting Chrony F1 and have been mostly disappointed with it's results in the sun. I have to put a piece of white foamcore over the rods to provide shade for the eyes for it to work correctly.

 

[tulsadave2003]

I used the diffuser plastic attachments that came with it. It says you DONT have to use them when in the shade, but I tried it without them under my carport (shooting into a berm) and it wasnt reading. So I put the diffusers on that came with it and its been 100% so far. Yes I did move out to full sunshine but I found I needed the diffusers even in shade.

 

[Blitzfike]

I have both Pact and Chrony machines and they all work better with the diffusers on. You can change the direction you are shooting to get the sun at the right angle and make it
work some of the time, but at a rnage, thats hard to do. I like the chrony better than I do the Pact. blitzfike

 

[Pulp]

Just remember, chronographs are designed to measure the velocity of a bullet going over it, not through it. Don't ask me how I know that!