Anyone bought one of those cheap Chinese chronys off that auction site?

[felix gunner]

Thanks guys.

I was thinking of writing one out (for quick evaluation) but is there a crib sheet/excel graph or whatver online with given calculations, ie left hand column reading say feet/metres in 10ft increments of 200 fps to say 800 fps and along the top given power for certain grains ie 5 thru 20 etc?

[Alakar]

Absolutely...

You are squaring the velocity and using grammes not grains aren't you...

Doh !
It might help if I square it .
Oops ��
Many thanks for working it out for us all , much appreciated.

[Jesim1]

Doh !
It might help if I square it .
Oops ��
Many thanks for working it out for us all , much appreciated.

Come on Alan, keep up, whatever happened to...…………………….

0.67 grams , come on James , everybody knows that !

Google is my friend

[felix gunner]

Harvey got a link to the £25er?

[Alakar]

Come on Alan, keep up, whatever happened to...…………………….

Nobody likes a smart arse

Didn't say I could add up.

I should of known it would come back and bite me on the butt !

Google is only my friend if I enter the correct information.

[GrandadG]

Harvey got a link to the £25er?

Here you are

233006552634

[phil384]

Tried mine out today and really pleased with it...

This is my tuppence :

First off its really lightweight, but very neatly made - quite unbelievable for £18 delivered from China.
It consists of the electronics and display sitting above two sensors with a vee block and clamp to align your barrel with these sensors.
The top clamp can be removed and a larger 'U' clamp used for guns with moderators or foresights this keeps everything in line and removes the chance of 'accidents'...
Or you can leave off the clamps and just rest the barrel on the vee...

(Its worth noting there is also a second version with 2 rows of IR leds which has no clamp and you shoot through for about £25 if you prefer.)

The instructions are completely in Chinese with not even a picture in sight, but in reality its not a problem as it is simple enough to use its basic function of being a chrono...
Press button to turn on, wait a few secs while it cycles through a self test, when the two dashes come up on the screen its ready.
Shoot, read speed off, repeat, press button again to cycle back through shot results, long press to turn off - simples.
The speed reads in metric only - to one decimal place below 100m/s and to whole numbers above.
I believe it max's out at about 800m/s - but don't quote me on that.
There are some translated instructions about including it's energy calculation features - but I'm still trying to locate them...

But the important things are - is it accurate and reliable?
Accuracy - I also have a Chrony F1 and using a multi-pump Crosman which is ultra-consistant it certainly is...bang on the money from 270fps right up to 750fps.
Reliable - this is the winner every shot read, every time and not at all ambient light fussy. Now as whether its reliable long term? - its too early to tell...buts lets just remember that price £18...!

Final verdict : Love it....

Ordered on your recommendation. No pressure

[felix gunner]

Here you are

233006552634

Cheers, did not realise they were only 2" wide.

[v1ktor]

Combro is cheap - compared to other similar products.

Combro is accurate - compared to other similar products.

What more is required?

[felix gunner]

Well, ordered one - found them on Aliexpress at £13 delivered (using the new user voucher code).

https://www.aliexpress.com/item/Shoo...AbTest=ae803_3

[bcham]

Well, ordered one - found them on Aliexpress at £13 delivered (using the new user voucher code).

https://www.aliexpress.com/item/Shoo...AbTest=ae803_3

just ordered came to £12.65 with code.

[felix gunner]

Combro is cheap - compared to other similar products.

Combro is accurate - compared to other similar products.

What more is required?

As discussed, many of us also have a Combro, but it is a faff to put on and off certain guns (especially when constantly tinkering), is pretty unworkable with some and I've shot mine twice trying to use it with guns it's not suited for.

Hence wanting an alternative.

[harvey_s]

Combro is cheap - compared to other similar products.

Combro is accurate - compared to other similar products.

What more is required?

No-one is knocking the Combro... it was/is a genuine lower priced alternative to the traditional F1's, Skans, etc. and the after sales service Robin provides is also second to none.

But, and it's a big but...that pellet hole is very small and requires precise alignment - not so easy to align with non-round barrels or forends and they are no good for CO2 powered guns where the CO2 cloud makes them either inaccurate or useless.
I've had two of them in the past and they are good if you have a very limited set of needs.

This little unit however ticks all the boxes for a very low price.

[short-carabine]

No-one is knocking the Combro... it was/is a genuine lower priced alternative to the traditional F1's, Skans, etc. and the after sales service Robin provides is also second to none.

But, and it's a big but...that pellet hole is very small and requires precise alignment - not so easy to align with non-round barrels or forends and they are no good for CO2 powered guns where the CO2 cloud makes them either inaccurate or useless.
I've had two of them in the past and they are good if you have a very limited set of needs.

This little unit however ticks all the boxes for a very low price.

Mine arrived on the weekend, and looking forward to giving it a try out. I find the ProChrono I have a bit of a faff and a bit tetchy with light. Have always used a Combro on the CO2 guns I have that it will fit and just put a bit of paper between muzzle and Combro if not using a moderator. If this one works better with CO2, I'll be a happy bunny At £18 these are a bargain

[felix gunner]

Hmmmmmmm, so much for Aliexpress: "dear friend so sorry to tell u that we just found this product have some quality's problems we can't send it to u could u cancel the order and choose the cancel reason"other"or "i don't want it "and then we will return your money" (SIC).