How to chrono an APS CAM870

[Scythian]

Happy Christmas lads. Just wondering if it's even possible to chrono an APS CAM870 due to the wadding and gas ruining the readings. I've had a good look around online and can't find any information on how it's done. I'm considering buying one but if chrono if going to be an issue it might not be worth the hassle.

 

[Enid_Puceflange]

I owned one for over a year

Chrono was a pain in the proverbial

One site I visited , it chrono’d at almost 900 fps, the marshal just laughed and let me use it.

I never managed to get an accurate reading due to what you have already mentioned (caps, beebs then wad) coming out and screwing up the reading.

There are so many different ways to load the shell as well, which will give you a different result.

For example

You could (if you were a cnut) …..

Prime the chamber with gas Co2, then use a cardboard wad, and use a few of these for the Chrono check. The wads shreds when the gas is released giving a lower muzzle velocity than if you primed with liquid Co2 and used plastic wads which don’t shred. Giving you a waaay higher muzzle velocity. 
 

A lot of sites are wise to this, and have banned their use.

Its an awesomely realistic toy to field though

 

[Scythian]

Thanks for the heads up. Shame it's so difficult to chrono as it looks really nice.

 

[Enid_Puceflange]

Thanks for the heads up. Shame it's so difficult to chrono as it looks really nice.

Click to shrink...

Not just difficult to Chrono…..

The shell gas chambers are a royal pain in the hole

They eventually leak and become unfixable without new seals , which in themselves aren’t expensive, but shipping from HK or TW costs like 10 X the price of the seal kits, so you have to buy a good few to make it cost effective.

I ran mine with over 50 X Power shells , which was almost £500 worth alone and an extra 30 shell casings to make bombing up less of a chore

The most cost effective way to gas them is either 88gr Co2 bulbs at £6/7 a pop and only gives circa 15-20 “good” fills

Then with all the other paraphernalia to run along with it, I think I worked it out to cost me 37 pence per trigger pull ?

Heroin is cheaper, but nowhere near as good a fix ?

But don’t let me talk you out of it, find a used one with a few shells and get it out of your system 

 

[Scythian]

Yeah, think I'll give this one a miss?

 

[Enid_Puceflange]

It is though, tbf

Awesomly Intimidating ?
 

View attachment 141894

 

[Krisz]

You don't because chronos usually go crazy when 3 bb's go through at the same time. 

 

[Enid_Puceflange]

You don't because chronos usually go crazy when 3 bb's go through at the same time. 

Click to shrink...

These things shoot around 12 bb’s in one shot

(depending on how you load the shell) 

Awesome ?