chronograph

[sundance]

I had a Chrony Master for 17 years and it recently died. (I have a 100 yard range at the house and used that chrono 30-50 times every year.) .I traded it back to Chrony for a new one .New one arrived a few days ago and fell apart when I was putting the rods in it for the first time. I would not recommend that chronograph.

 

[6MMsteve]

A chrono won't help bad bullets, bad barrels, and the other thing

 

[BRatigan]

After more than 50 years of shooting I finally broke down and purchased a chronograph. The model is the Competition Electronics ProChrono DLX. The unit was very easy to set up with traditional diffusers and metal supports. Sat on my Leitz Tilt-all tripod without a fuss. Bluetooth worked on my Android phone at the range perfectly and I also linked it with my mainframe.
I decided I would run three known loads through it with my Win 94 Rifle length barrel in 30-30 to see what numbers I would get. I mostly wanted fps as I already expect 1-1.5 inch groups at 50 yards with iron sights from sand bags.

So here is the data and loads.

Load 1
Bullet: Sierra 150 gr FN #2000
Case: Federal
Powder: RX-7 at 27.9 grains
Primer: WLR
Shot 1: 2312, Shot 2: 2313, Shot 3: 2324, Shot 4: 2282, Shot 5: 2290
Average = 2304, Extreme Spread of 42, Standard Deviation of 16.
This load shot very well and showed only slight primer flattening. This load was point of aim.

Load 2
Bullet: Sierra 150 gr FN #2000
Case: Federal
Powder: Winchester 748 at 33.8 gr
Primer: WLR
Shot 1: 2163, Shot 2: 2207, Shot 3: 2268, Shot 4: 2209, Shot 5: 2179
Average = 2205, Extreme Spread of 105, Standard Deviation of 36.
Also very accurate with normal primer appearance and shoots 2 inches low with my sights.
All shots for the loads were made using one sight setting.

Load 3
Bullet: Hornady 160 FTX
Case: Federal
Powder: Winchester 748 at 29.8 gr
Primer: WLR
Shot 1: 2026, Shot 2: 1984, Shot 3: 1967, Shot 4: 1973, Shot 5: 2019
Average = 1993, Extreme Spread of 59, Standard Deviation of 24.
This load provided the tightest group with normal primer appearance. It shot 5 inches low with my sights. I am going to bump this load up to 31.5 gr and gather that data at a later session.

This is just a first look at the equipment and results with the unit 15 feet in front of the muzzle.

I believe these numbers are good, but others please feel free to chime in.