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MrNexus8

FPS ... how can you tell?

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Does anyone know how I can tell the FPS of my G36C? I'd like to bring it to my first event next month but if the site is saying 350 fps max, how do I know if mine is within that limit?

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get it chrono'd at the site

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Is it a new one, of so then it should have an aprox fps on the site you bought it from. If not then you shoudl have an aprox fps from the previous owner.

 

Also manufacturer would be good, as a TM will have a lower fps than a JG for example (unless someone has buggered around with it)

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It is 6 months old and hardly used. It's a JG ... I'll go back to the shops's website and check there. I was rather hoping it would be within 350 otherwise I'llhave brought it along for nothing and there may be no spares to hire .. I have 3 weeks to sort it though, so thanks guys ^_^

 

PS thanks for that link U-T-J ...

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try poor mans chrono if it goes through 2 cans its probably 380 fps or if it goes through the bottom of the can then its easily 400fps

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If its a JG then its about 350-370 fps, but that will be without the hop on. I would recomend sticking a few mags though it and then making sure the hop is set right, and you should be around 350.

 

You could also pop along to your local site and ask them to chrono it. You should not have to pay to play for the day, just ask them to chrono it.

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turn the hop off, get a coke can, load some .20g and shoot it at point blank.

 

if it goes through 1 layer: around 280 fps or less

 

if 2 layers: around 320 fps

 

if 3 layers: around 380 fps

 

if 4+ over 450 fps

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get a chrono or when you go if its over either swap the spring or clip it,get their early and then if it is someone will do it for you if you ask them nicely (or you could do it yourself)

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That website crashed my internet.

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I prefer U_T_J's website method to the can one. Seems a lot more accurate than the cans, considering that certain factors may affect the BBs going through the can.

 

P.S. When I went on the website, I also had a bit of a lag spike there. Too many snipers on forums ;)

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The can method is woefully inaccurate.

 

Even if you don't take into account the different penetrative capabilities of different weights of BB, different plastic configurations and other material differences, you are still left with the thickness of the can material, how it is treated, different materials of construction etc. etc.

 

How far something penetrates is never a good measure of velocity or energy.

 

There are a few ways you could do it, involving pendulums, or the paper penetration method in the link mentioned above, but again you have all sorts of inaccuracies (actually, the pendulum method is probably the most accurate method of all, even better than the light chrono's, but it requires specialist kit, some pretty accurate measurements and some fairly advanced maths (ok, it's very simple maths actually, but still requires a good understanding of the physics involved).

 

The best method is to use a chrono. It's the only realistic way to get a decent idea of the velocity a BB is fired at. I have the shooting chrony which I use for my RS rifles. I keep meaning to get it out and test it on my BB guns, but it should be accurate for those.

 

The simple answer is, there's no real way for you to measure the velocity of your BB gun without a chronograph. Ask around on here, there is almost certainly someone near you who has one, or has access to one, that you can use. You can buy a muzzle mounted chrono for around the £50 mark (look up Combro) but they tend to be rare as hens teeth for long periods of time.

 

If you're anywhere near Swindon/Newbury/Reading I can run your gun over my chrono, just drop me a PM.

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The other alternative is to buy and fit an M90 spring and be absolutely certain that its site legal.

Though with a gen3 JG gearbox and hop I wouldn't expect it to be taking on systemas with an M90 fitted!

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so i just fitted a new spring/guide/piston to my snow wolf sw-10 ......... anyone wanna guess the FPS, before i get it chrono'd

(0.2g zero one bb's @ point blank, can is a Bacardi mixer can)

post-6919-0-01078100-1366819471_thumb.jpg

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