Shooting Chrony vs. 9mm

• Apr 27, 2014

• #1

JettaRed

Ultimate Member

Mar 13, 2013

1,138

Middletown

There's always the risk of being too much in a hurry when trying to put 124 gr through a tiny window at 1000 fps.

This is the riser rod that is used to hold the diffuser.

The rear sensor took a beating, but was OK.

Here is my fix to reduce the impact of a stray hitting the riser rod. Here's my fix for the future. Cut the rod that is the riser for the diffuser a couple of inches from the bottom. Using rubber vacuum hose with 1/8" inside diameter from the auto parts store, use it to connect the two pieces of the rod. Not sure that will totally make the Chrony shock proof, but it should significantly reduce the potential for damage from the rigid rod getting hit by a stray bullet. I was able to use 8-32 threaded rod from Home Depot to replace the damaged rod.

Here are the other precautions I had taken. Basically, placing a steel plate in front of the chronograph chassis. (That may not be a good idea if a stray actually does hit the plate, which is only about 10 feet away.)

 

• Apr 27, 2014

• #2

C

CAS_Shooter

Active Member

Jan 24, 2012

510

Has happened to the best (and not so best) of us.

 

• Apr 27, 2014

• #3

Bikebreath

R.I.P.

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Jun 30, 2009

14,836

in the bowels of Baltimore

Can't tell from the photo, but shooting steel at less than 30' away is not recommended...down right dangerous.

 

• Apr 27, 2014

• #4

JettaRed

Ultimate Member

Mar 13, 2013

1,138

Middletown

Bikebreath said:

Can't tell from the photo, but shooting steel at less than 30' away is not recommended...down right dangerous.

Click to expand...

Yeah, that occurred to me afterwards. I was not shooting at the near plate, but using it to shield the Chrony. Won't be doing that again. The target I was shooting at was 10 to 12 yards.


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• Apr 27, 2014

• #5

Bikebreath

R.I.P.

MDS Supporter

Jun 30, 2009

14,836

in the bowels of Baltimore

JettaRed said:

Yeah, that occurred to me afterwards. I was not shooting at the near plate, but using it to shield the Chrony. Won't be doing that again. The target I was shooting at was 10 to 12 yards.


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Click to expand...

Glad you learned without getting shrapnel-ized.

 

• Apr 27, 2014

• #6

BradMacc82

Ultimate Member

Industry Partner

Aug 17, 2011

26,177

Came out better than some of us have.

My chrony lasted 3 range trips before it met it's end testing a 9mm load for someone else with their gun/ammo.

 

• Apr 27, 2014

• #7

DaemonAssassin

Why should we Free BSD?

Jun 14, 2012

23,991

Political refugee in WV

BradMacc82 said:

Came out better than some of us have.

My chrony lasted 3 range trips before it met it's end testing a 9mm load for someone else with their gun/ammo.

Click to expand...

IIRC you even posted a thread about it and asked if anybody wanted a gently used chrony.

 

• Apr 27, 2014

• #8

JettaRed

Ultimate Member

Mar 13, 2013

1,138

Middletown

BradMacc82 said:

My chrony lasted 3 range trips before it met it's end testing a 9mm load for someone else with their gun/ammo.

Click to expand...

I got the F1 Master Chrony and apparently I can get a replacement chassis with sensors and diffuser for $69.95 plus shipping, should I ever need it. Does anyone know if you can use the remote display with a regular F1 Chrony?

 

• Apr 27, 2014

• #9

platekiller

Ultimate Member

Jun 7, 2011

1,780

Martinsburg, WV

That's why my pact I got from my uncle has about ten sets of sides and screens.

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• Apr 27, 2014

• #10

toolness1

Ultimate Member

Jan 5, 2014

2,723

BFE, Missouri

That sucks, but I'm glad it was just the rod that you hit.

If I was going to make a shield for mine, I would bend a piece or make a "V" somehow, with the point facing me. That would only work at a private range where you have plenty of distance to each side with nothing in danger of a ricochet, though (which would work where I shoot mine)

I have the F1 Master and I love it, except those dang crappy white plastic pieces to shield sunlight on clear days. I need to replace those with something else, they give me fits and aren't going to last long.

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• Apr 27, 2014

• #11

J

john_bud

Ultimate Member

Sep 23, 2009

2,045

You know there is no "magic" as to those diffusers? You could just not use the factory rods / diffuser. Put the bare chrony in a box with a wire frame holding wax paper over it. heck, you could use a cardboard box with the sides / top cut and the wax paper glued on. No danger to the unit from a rod strike that way.

The steel plate protector is a good idea, but angle it down so the shrapnel is tossed safer. And as stated, distance is your friend when potentially hitting steel.

 

• Apr 28, 2014

• #12

J

Jimbuck

Active Member

May 26, 2009

253

I did the same to mine with a 40cal round. I replaced my rods with 1/4 dowel and works fine. If it gets hit, they just break and do not destroy the sensors.

 

• Apr 28, 2014

• #13

JettaRed

Ultimate Member

Mar 13, 2013

1,138

Middletown

I'm thinking using sandbags as a shield. Just have to figure how.


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• Apr 28, 2014

• #14

JettaRed

Ultimate Member

Mar 13, 2013

1,138

Middletown

Jimbuck said:

I did the same to mine with a 40cal round. I replaced my rods with 1/4 dowel and works fine. If it gets hit, they just break and do not destroy the sensors.

Click to expand...

How'd you get ¼" dowels to fit? Someone suggested bamboo skewers used in cooking (and interrogations ).


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• Apr 28, 2014

• #15

M

Melnic

Ultimate Member

MDS Supporter

Dec 27, 2012

15,331

HoCo

How far away do you have to put that Chrony?
Your not using a pistol rest?

Maybe you can put something on the front that is thick and sacrificial but does not splatter the bullet as much?

 

• Apr 28, 2014

• #16

JettaRed

Ultimate Member

Mar 13, 2013

1,138

Middletown

The Chrony is at least 10' away--too close for steel. I'm thinking sandbags. I rest my pistol on my range bag on a table.


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• Apr 28, 2014

• #17

John from MD

American Patriot

MDS Supporter

May 12, 2005

22,891

Socialist State of Maryland

I always used my shot up Chrony to get a discount on the next higher model. I figure it was a way to save money.

John

 

• May 3, 2014

• #18

BradMacc82

Ultimate Member

Industry Partner

Aug 17, 2011

26,177

DaemonAssassin said:

IIRC you even posted a thread about it and asked if anybody wanted a gently used chrony.

Click to expand...

Think that was BenL, he shot his when he forgot to re-zero for the shorter distance.



My chrony never made it home that day, it got set on the 100 yard berm and everyone took shots at it. It died a noble death.

 

• May 6, 2014

• #19

JettaRed

Ultimate Member

Mar 13, 2013

1,138

Middletown

BradMacc82 said:

Think that was BenL, he shot his when he forgot to re-zero for the shorter distance.







My chrony never made it home that day, it got set on the 100 yard berm and everyone took shots at it. It died a noble death.

Click to expand...

You could have still traded it in. Shooting Chrony will take them shot up.


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• May 6, 2014

• #20

JettaRed

Ultimate Member

Mar 13, 2013

1,138

Middletown

Well, while it survived the 9mm hit, the .45ACP took a bigger chunk. Amazing thing is, it still works!

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