Well, I shot my chronograph


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119er
February 6, 2013, 10:05 PM
I thought I was immune, but nope. Now all I have to look forward to is M1 thumb. Or maybe shooting a later model chronograph. It was a trooper though. Still working. It even recorded the velocity that took it out! 1451 fps from a 125gr .357 Mag. My fault of course being dumb and trying to get it to read on a cloudy day in late afternoon. I thought surely if I remove the screens and aim the sensors at the sun! Of course with the arms gone I lost my visual reference and that was it. I foolishly thought that the closer the bullet to the sensor the better right?

It is a CED Millenium and the rectangular slots of the sensors are completely gone or jagged. This will make it nearly impossible to attach skyscreens.

Now the questions.

Will this damage effect it's accuracy?

Do I duct tape this thing up and take the ribbing I so rightfully deserve, or buy a new one and save some dignity?

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rodregier
February 6, 2013, 10:34 PM
Primary determinant of accuracy is the spacing between the detectors.

Tape it up and test with .22LR.

Chronos are downrange, there are those who have shot a chrono and those that are still waiting on the opportunity :-)

Trent
February 6, 2013, 10:35 PM
HAHAH! Sorry I can't help but laugh a little.

I remember the muzzle blast from my 50 BMG blowing the faceplate off mine and sending it flying.

If it's still READING velocities, you have to believe it's still working. BUT, if the slots are damaged, it might be reading the bullet shadow in the wrong location. Make sure you get the slots "fixed" (with tape or otherwise) so they are in their original dimensions... well, best that can be done since you SHOT it. :)

FYI, screens are needed on cloudy days, not sunny days. The sky is actually BRIGHTER with really bad ambient light coming down at all angles, on cloudy days, washing out the shadow of the bullet, so you have to cut down on the "glare" the sensors see. (Think bright white vs. a much darker blue on a clear day).

You'll get your best, most accurate chrono results on a sunny day with a beautiful blue sky directly above the chrono. You will get crap results if the sun is high and shining directly on to the chrono. Mixed results when cloudy, but "shades" help cut down the glare on the sensors.

cfullgraf
February 6, 2013, 10:54 PM
Welcome to the club. I have had two chronographs expire from lead poisoning.

The sensors are the thing. If they are not damaged, just the diffusers, accuracy should not be effected. You can jury rig something to get some kind of diffuser mounted when needed. You could tape or glue the housings back together to shield the sensors.

You should be able to buy replacement parts and not need to buy an entire new chronograph.

By the way, my current chronograph is an CED M2.

LubeckTech
February 6, 2013, 11:26 PM
Been there, done that, got the tee shirt.
Shot & killed one - grazed another a couple of years later.
I'm working on designing one where the sensors are the only things that could get damaged with the electronics being remote either wired or wireless. The electronics being a Laptop/netbook computer, PDA or smart phone/tablet. It is doable but I don't know if iI will find the time in this life until I zap my currently wounded chrono.

Hardtarget
February 6, 2013, 11:34 PM
Wait, wait....all your shooting buddies...you know...the ones that you have joked on over the years (all in fun) deserve the chance to have a little fun with this! :D

Give 'em a chance and grin and bear it...all in fun!

Now, I'm really sorry to hear you did this. I don't have a chrono and decided long ago that I would never use someones equipment for fear of this very thing. I bet it is just too easy to do. I know that if I ever get one...I may as well get two. You know...back-up!

Mark

jbkebert
February 6, 2013, 11:34 PM
I placed an arrow dead center in the digital screen of mine. Just never worked after that. Don't feel bad.

oldandslow
February 7, 2013, 06:02 AM
119, 2/7/13

Welcome to the club. I'm almost a Chrono Ace- three down and two to go. The first one, a Pact, malfunctioned each and every time for five years and would only work before sunrise and after sunset. I finally put it out of my misery with three 9mm rounds to the sensors. It worked just as well after being shot as it did before.

The second was a shotgun wad to the LED screen. I forgot that I had to protect the Chrono from the wad. Oh well.

The third was a 30-06 bullet creasing the tops of the the sensor housing (not enough scope clearance when shooting above the sensors). Still works fine though.

best wishes- oldandslow

thomis
February 7, 2013, 08:04 AM
Chronos are downrange, there are those who have shot a chrono and those that are still waiting on the opportunity :-)
Ha ha! I'm so glad I'm not alone! I shot mine twice with a .243. It was a weird angle. Funny thing is, I put two holes in the farthest end, right through the sheet metal frame with out any damage to the function. I still use it and it works fine. I will have to take some pics now that I'm an out of the closet chronograph shooter.

Trent
February 7, 2013, 09:18 AM
I still have to pack my faceplate in my range bag when I take my chrono out, so I can hold it next to the chrono to know what buttons are what... :(

119er
February 7, 2013, 10:14 AM
I had a feeling I wasn't alone. I was agitated and complacent when I shot it. It was an old CED M1 that I scored at an estate sale. That thing worked perfect except for the day that I shot it. Then it worked WHEN I shot it!

CB900F
February 7, 2013, 11:58 AM
Fella's;

There is a solution to the problem, but it's not cheap. It's called an Oehler chronograph, where the downrange screens are relatively inexpensive & the OMG! part sits on the bench with you.

I know very well what the downrange parts cost, and they are below SWMBO's checkbook radar.

900

thomis
February 7, 2013, 01:07 PM
SWMBO stands for what?

sinbad339
February 7, 2013, 01:14 PM
She who must be obeyed...

Sent from my HTC Sensation 4G using Tapatalk 2

mdemetz
February 7, 2013, 02:35 PM
FYI, screens are needed on cloudy days, not sunny days. The sky is actually BRIGHTER with really bad ambient light coming down at all angles, on cloudy days, washing out the shadow of the bullet, so you have to cut down on the "glare" the sensors see. (Think bright white vs. a much darker blue on a clear day).

You'll get your best, most accurate chrono results on a sunny day with a beautiful blue sky directly above the chrono. You will get crap results if the sun is high and shining directly on to the chrono. Mixed results when cloudy, but "shades" help cut down the glare on the sensors.

Opposite of what Shooting Chrony says in their instructions. They say diffused light is best and to use the diffusers on bright sunny days.

jr_watkins
February 7, 2013, 02:58 PM
I agree with Mdemetz, I use the screens on sunny days and don't bother with them on heavy overcast days.

jr_watkins
February 7, 2013, 03:01 PM
Mine is a Competition Electronics model...as yet unscathed. :neener:

Trent
February 7, 2013, 09:45 PM
Opposite of what Shooting Chrony says in their instructions. They say diffused light is best and to use the diffusers on bright sunny days.

Hmm. That's odd. The instructions that came with my Competition Electronics ProChrono instructions says the opposite.

Wonder why there'd be a polar opposite difference?

Maybe I need two chronies, one for overcast and one for sunny days. :)

r1derbike
February 8, 2013, 03:00 AM
I did too! But it was from a pellet gun. Just nicked the upper lip of the rear. Haven't gotten brave enough to set it out to 500 yards yet, and do some hands on fps measurements with powder-burners. The ammo white papers will work just fine, thanks!

LubeckTech
February 8, 2013, 08:08 AM
After shooting the rods that hold the diffusers of my Shooting Chrony F1 (green folding chronograph) I find it works well without the diffusers. Mainly I think the diffusers are helpful on a really sunny day where intense direct sunlight shining on the sensors would saturate them to a point where they would not produce enough of a "pulse" to reliably detect the bullet's passing.

Bovice
February 8, 2013, 11:22 AM
I shot mine once, I was working up loads in 357 SIG with plated bullets. One tumbled and hit one of the little poles holding up the screens. The chronograph still works fine, but one pole has a curious bend in it.

klausman
February 9, 2013, 05:39 AM
Yup, I killed a Crony a couple of years ago while trying to learn to shoot a .44. The flinched shot went right through the O in Crony on the face plate. I got a new sensor piece from the company. I have been thinking of having it mounted. :rolleyes:

Now I always use the guide rods to provide a visual of the pass through area, and to help align the sensors to the path. The diffusers are only for sunny days. Oh Boy My Favorite!

Trent
February 9, 2013, 08:12 AM
Now I always use the guide rods to provide a visual of the pass through area, and to help align the sensors to the path.

I do the same thing.

I haven't used my chrony in awhile though, I lost the little piece that came with my taller tripod that lets me mount the chrony. Then I found it, and lost it AGAIN. I *know* I put it "somewhere safe" that I "wouldn't forget about" but ... yeah.

You all know how THAT goes.

4v50 Gary
February 9, 2013, 07:02 PM
I nicked the top of my Chrony once. It taught me to check before I shoot. The guide rods are a good idea.

Reloadron
February 9, 2013, 08:40 PM
I managed to take out a sky screen support once, fortunately an inexpensive lesson. You aren't the first and won't be the last shooter to shoot his chronograph. :)

Had a friend once who managed to discharge a .380 into his brand new Dillon scale. I told him, send it to Dillon and he didn't want to because he was embarrassed. Told him to give it to me in that case as I don't embarrass easy. He sent it in and got a brand new scale, who cares if the guys at Dillon had a good laugh.

Ron

jgh4445
February 9, 2013, 09:15 PM
Lubeck Tech..go to Wally World or Lowes and get some small diameter wood dowels to replace the metal screen rods. You can shoot em all you want and not damage the unit.

taliv
February 11, 2013, 03:05 PM
dude, i've shot my CED chrono so many times...

heck, i've ordered replacements and have 3 rifle holes in them

BullfrogKen
February 11, 2013, 03:29 PM
I nicked the top of mine with a friend's AR. He wanted to chrony his ammo and I didn't want him to shoot my chrony. So I did it. :)

taliv
February 11, 2013, 04:40 PM
i shot my shooting chrony too

Trent
February 11, 2013, 05:01 PM
I'm going to start taking mine out to the range with me to chrono handloads again on the 300wm, 357, and (when I finally find one) a 44 mag, so wish me luck. I have a feeling it's going to catch a 357 or 44 at some point.

splattergun
February 11, 2013, 07:11 PM
If Boone and Crocket won't recognize the wiley Crony as a trophy species it is up to HighRoaders.
We ned pics

Trent
February 11, 2013, 08:49 PM
Yup, I propose a new board rule! Whenever you SHOOT your Chony, you have to post a pic!

We need a Chrony Hall Of Shame thread!

119er
February 11, 2013, 10:15 PM
Here's the proof. Sorry for the phone pics but the real camera is dead. The worst one was actually the front sensor. I guess the bullet tumbled and knocked that elliptical chunk out of the rear sensor slot? Good thing I didn't spring for the Oehler!:eek:

Trent
February 11, 2013, 11:54 PM
Whoa, that's not gonna buff out.

I'm trying to wrap my head around how that rear damage happened. ???

Actually, kind of scratching my head.

Tumbling would be one idea, like you said, but I'm thinking it just BARELY got grazed. Just enough to import enough force to the plastic to cause it to flex inward, and that "chunk" to give way from the sudden shock and the flexing inward.

Dunno. Just a guess.

Bovice
February 12, 2013, 12:51 AM
It's rare that a material is perfectly isotropic, meaning that the structure at the atomic level and composition are completely uniform throughout.

The plastic at the rear with the big hole could have fractured along a void from the mold process in manufacturing. The stress of the bullet impact would be magnified at thin-wall areas nearest the impact, causing the giant hole as the rest of it blew out.

dirtengineer
February 12, 2013, 01:10 AM
That is one big advantage of the CED, go buy the parts you need.http://www.midwayusa.com/product/183896/ced-replacement-sensor-for-millennium-2-chronograph-blue

I nicked my screens with my LCP.... I think it is pretty much inevitable.

Trent
February 12, 2013, 08:11 AM
It's rare that a material is perfectly isotropic, meaning that the structure at the atomic level and composition are completely uniform throughout.

The plastic at the rear with the big hole could have fractured along a void from the mold process in manufacturing. The stress of the bullet impact would be magnified at thin-wall areas nearest the impact, causing the giant hole as the rest of it blew out.

Look at the TOP sensor.

Not the bottom one. Both were hit.

He's questioning what happened to cause the middle of that top one to blow out, since the bullet only skimmed it. (That's supposed to be a rectangle, not a rectangle with a big half-oval blown away)

bdgackle
February 13, 2013, 09:32 PM
I've also shot two now. A third is sitting nervously on my desk.

One little hint, though: if you shoot it, and it still works -- you did it wrong. You want to put the round directly through the faceplate, so that it travels through the full body of the device and hits both sensors. That produces the most effective stop. This can be achieved with careful aim, or just a good flinch.

LubeckTech
February 13, 2013, 11:31 PM
http://i1043.photobucket.com/albums/b437/LubeckTech/hronoBackcr_zpsbe51900e.jpg

Here's Mine!!

Not only does it work I think it works a little better than before!

Rangemaster
March 30, 2013, 06:39 PM
Well, I just did the same to mine today.

http://img.tapatalk.com/d/13/03/31/yguperur.jpg

Only the second time using it, the wind got a hold of it.


Sent from my iPad using Tapatalk HD

klausman
April 1, 2013, 10:01 AM
It was such a perfect shot that I had to have it mounted.

PRD1
April 1, 2013, 10:16 AM
I destroyed 2 of the 3 skyscreens for my Oehler 35P - with my Merkel .500 Nitro Express.
I had lined everything up so carefully (I thought) - everything looked right.
BOOM! Bits of plastic sailed in glittering, graceful arcs. The first skyscreen flopped over to the right - an immediate kill. The second skyscreen took a major hit, but stayed on its feet. The third skyscreen was wounded by fragments, but survived.
Too much gun? I think not.
PRD1 - mhb - Mike

Reloadron
April 1, 2013, 11:21 AM
I destroyed 2 of the 3 skyscreens for my Oehler 35P - with my Merkel .500 Nitro Express.
I had lined everything up so carefully (I thought) - everything looked right.
BOOM! Bits of plastic sailed in glittering, graceful arcs. The first skyscreen flopped over to the right - an immediate kill. The second skyscreen took a major hit, but stayed on its feet. The third skyscreen was wounded by fragments, but survived.
Too much gun? I think not.
PRD1 - mhb - Mike
Heck, I managed just about the same feat with a tiny 7.62 x 25 from a CZ pistol. When I called Oehler I ordered a few extra pices of plastic, sides and tops. :)

Ron

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