Chrony issues

[marcella69]

I was at the range yesterday attempting to run a shot string for my new FX Impact .30. I got about half the bottle done when an individual started shooting in the lane next to me. Every time he shot, my Chrony would register an error and I would have to reset it. It made continuing my shot string prohibitive. Has anyone else experienced a similar issue or knows why this is happening?

 

[broekzwans]

What type of weapon did he use? A powder burner?

Could be that the smoke of a firearm is blowing particles over the light detector in your chrony which results in an error. But this only happens if he's very close to you or using a muzzle brake or something similar.. This is also the reason that for firearms you have to use a certain distance between the muzzle and detector when conventional chrono's are used (so not like the LabRadar or something similar)

 

[marcella69]

broekzwans, thanks for that; that did not occur to me, makes sense. I thought it was the concussion or vibration that knocked my Chrony whackadoo. I guess I'm just gonna have to do the shot strings in my apartment from now on, like I did with my Benjamin Marauder .22 and Daystate Pulsar .25. Since I switched to the .30 cal. FX Impact, even my heavy-duty .22 rim-fire bullet trap is inadequate. Perhaps I could line the trap with some sort of foam or putty to reduce the ricochets and noise.

 

[broekzwans]

Vibration/shockwave can also cause this error Maybe it is possible to set up a plate between you and the shooter next to you or sit somewhere on a "quiet" side.

If you put some jeans in and an old wollen sweaters on the front in your trap you can hammer it with almost all calibers of airguns without ricochets. The sound will be the same as slapping jeans with your hands so it's not loud at all (depending on energy of course, the more energy the harder the slap).

 

[Tominco]

You could make something like this...
Shot box plans
I've shot that one with .223, 9mm, .22 and none of them hit that back. And I've drilled it with .30's from my Impact. I pulled out about 30lb's of lead from it after a year of shooting at it. 
There are other plans out there as well. They're all the same basic idea. 
Tom

 

[broekzwans]

I use a sort of similar idea as Tominco only then with clothes in it



The clothes were falling a bit down, have to push m up once in a while.



and a 1cm thick aluminum backplate, just to be sure:



The total combination weighs a bit much but I can shoot for years on these 2 boxes.

 

[marcella69]

Thank you, bro'; I will check my closet!

 

[marcella69]

Thanks, Tominco; I wish I would have got your advice before I dropped $ on the bullet trap!

 

[iride]

That's what I like to see is stuff built like this,
For quick shots and fast sightings, I use an old suit case I packet with old clothes ,
I have shot the snot out of it and its still holding together good, 
Must be the brand that gorilla used to play with on TV ?
Mike

 

[marcella69]

bro', I filled my trap with rubber mulch and taped some old towels and sheets over the front. Works like a charm! The pellet doesn't even make to the back of the trap; quiet as a mouse you-know-what! Thanks guys for all the great advice

 

[Tominco]

Have you guys ever had any issues "drilling" through the clothes by shooting in the same spot over and over again? (Just curious)
Tom

 

[AirgunBill]

I know I was not ever going to take the chance having a pellet going through my trap, so I add this scrape piece of steel for a backer plate. Bill

 

 

[Tominco]

Yeah, I've done the same with my traps. Cheap insurance. 

 

[marcella69]

Man, you guys are getting me mad nostalgic for the good 'ole days when I had a tricked-out workshop! I live in a small one-bedroom apartment now, so my ability to do these neat projects is limited. God, those were the days; I really like these kind of projects!

 

[broekzwans]

"Tominco"Have you guys ever had any issues "drilling" through the clothes by shooting in the same spot over and over again? (Just curious)
Tom

I only see the drilling in the first two/three layers of clothing. What I've noticed is that the pellets will start stacking in these holes if I don't move the trap. This stacking results in chunks of lead which stop the drilling. However if the chunks are heavy enough they'll fall down and a new chunk starts to form.

I only fired a couple thousand pellets into my trap yet so not a real endurance test.

@marcella69, is your chrony problem solved now? Because we're deviating far from the original topic

 

[AirgunNiels]

Hanging a piece of jeans in front of the trap will stop pellets from lower powered guns.
as a trap i use a old wheelbarrow and some rotten table tops in front of it to stop the pellets from comming out of the wheelbarrow. 

,Niels
(nice name broekzwans! Greetings from a fellow dutchman)

 

[Panzer]

My Chrony also used to have a mind of it's own, I installed the LED lighting system they now offer and all is well with all pellets tested.

 

[marcella69]

Actually, Panzer, my Chrony (Master, the blue one) works like a champ now. Apparently, I measured from the top of the sensor housing instead of the sensor itself when marking the uprights as per the instructions. She performs flawlessly now. IMO, Chrony would dramatically reduced its complaints if it would amend its instructions to address this common mistake.