Chronograph Upgrade Sucess

[Mal Paso]

BLT and I have were having problems with errors and failure to see shots with 2 different shooting chroneys. BLT gave me his shooting chroney and bought a new CED Millennium 2 Chronograph and still problems continued. Dillon customer service had suggested a black tarp under the chronograph but it was the CED instructions talking about "Glints" that got me thinking. A nice shiny bullet is going to reflect everything around it. If the bullet is reflecting as much light as the Sky Screens transmit, It Won't Be Seen by the Chronograph.
I glued some black velvet to 2 14x20" sheets of foam core board. I tested yesterday and out of 200+ shots I had 1 error.
22g 2400 NOE 429421 .431 4" Colt Anaconda 1494, 1493, 1499m 1505, 1493, 1499fps, ES 12fps
25g 300 MP Lyman 429421 6" S&W 629 1432, 1404, 1375, 1395, 1349, 1358fps, ES 83fps
BLT found some cardboard and black paint and soon had his CED Chronograph close to 100%.
This is the Shooting Chrony that took 2 22LR shots, so sports a new front plate.

[frankenfab]

Good info. Thanks for posting.

[Mack Heath]

Interesting. Just for info, Oehler Research encountered this problem years ago when Ken first introduced the sky screen. His solution was to change the software to trigger whenever the dectetor saw a change from ambient either minus or plus, meaning the shadow or the glint, respectively. Apparently, these other manufacturers haven't done that.

That is a good solution for the problem, though.

[Mal Paso]

The original version wasn't very rugged. This version is made from black Fluted plastic sheet. The 14 1/2 x 20" pieces were cut in the middle halfway through leaving a hinge. This cuts the carry size to 10 x 14 1/2". The Clip is a piece of 9 ga galvanized wire wrapped 1 1/2 times arround a 1" water pipe and slips over the center divider.
Working on better photo gear but wanted to get this out.
The Fluted plastic sheet is available from plastic outlets and art stores.
Being round a bullet can reflect light from almost 360 degrees. This setup removes as much light as practical from the bottom of the bullet.

[Mal Paso]

Mack
Thanks for the Oehler info. I've been dogging this one for a while.

[RugerFan]

Good info. I may have to give that a whirl.

[Artful]

I usually don't have a problem (well other than hitting the sticks) but I have a friend that has been having fits - I'll pass this along - thanks for posting it.