SpudFiles

hi
i have a Beretta Elite II Co2 BB Gun and it is saying the Velocity is 480 fps is there anyway to bring it up to 500 fps? im in Canada and the law here is anything over 500 fps you need a PAL so i what to try and get it to 500 ftp if it is possible im new to this and have no idea lol thanks...

Maybe adding a longer barrel will help? Problem is it might be hard to incorporate a barrel extension to the barrel your gun already has...

you could try a tighter barrel or longer one

remove the grips... in this way the CO2 will get a bit warmer (provided that the inside of your palm is in contact with the cylinder)

My advice is don't. Quite aside from the potential dangers of interfering with a CO2 pistol when you have no experience with their mechanisms, if Canadian gun law bears any similarity to UK law, then 500 fps will be an absolute limit. 501 fps and you're liable to be prosecuted.

Bear in mind that velocity will waver a bit from shot to shot and based on the temperature that day, so you will want a bit of leeway to ensure that you don't ever go over 500 fps. 480 is about as close as I'd want to get to be confident that if it were tested under any likely conditions, it wouldn't be over 500.

Indeed, in the UK, there's a 12 ft-lbs limit on unregistered air rifles, but I try and keep mine below 11.5 ft-lbs so that it's never at risk of going over the limit. (And it's a springer, which is much more consistent across temperature changes than a CO2 system.)
That last half foot-pound isn't going to be missed. It's about a 2% difference in velocity, and that's not going to noticed except over a chronograph.

If you ARE going to fiddle with it, I would strongly advise getting hold of a chronograph and clocking in the velocity before you start just adjusting willy-nilly.

Ragnarok wrote:My advice is don't. Quite aside from the potential dangers of interfering with a CO2 pistol when you have no experience with their mechanisms, if Canadian gun law bears any similarity to UK law, then 500 fps will be an absolute limit. 501 fps and you're liable to be prosecuted.

Bear in mind that velocity will waver a bit from shot to shot and based on the temperature that day, so you will want a bit of leeway to ensure that you don't ever go over 500 fps. 480 is about as close as I'd want to get to be confident that if it were tested under any likely conditions, it wouldn't be over 500.

Indeed, in the UK, there's a 12 ft-lbs limit on unregistered air rifles, but I try and keep mine below 11.5 ft-lbs so that it's never at risk of going over the limit. (And it's a springer, which is much more consistent across temperature changes than a CO2 system.)
That last half foot-pound isn't going to be missed. It's about a 2% difference in velocity, and that's not going to noticed except over a chronograph.

If you ARE going to fiddle with it, I would strongly advise getting hold of a chronograph and clocking in the velocity before you start just adjusting willy-nilly.

Ragnorak 500 fps with a bb is does NOT exceed the 12 ft lbs law. I made a .22 pellet rifle that fire 610 fps anf reaches 11,5 ft lbs

yeah but the guy lives in Canada and you need some sort of licence to own anything over 500fps

urgle the danish cow wrote:Ragnorak 500 fps with a bb is does NOT exceed the 12 ft lbs law.

You either didn't actually read my post, or you misunderstood it.

To explain, I live in the UK. This is where the law stipulates a 12 ft-lb limit.
fullyloaded lives in Canada. This is where the law has a 500 fps limit.

I was drawing a comparison between the law I deal with (12 ft-lb limit) where I leave a certain leeway to ensure that I remain compliant, and the law that fullyloaded is dealing with (500 fps limit) - where he would do well to leave leeway to ensure he remains compliant as well.

I do not notice a performance difference between 11.4 ft-lbs and 12 ft-lbs without using a chronograph - but that difference ensures I stay legal.

Similarly, he will not notice a performance difference between 480 fps and 500 fps unless he has a chronograph, but trying to aim for 500 fps may make his CO2 pistol illegal.

Also, I do know that 500 fps with a steel .177 BB is not 12 ft-lbs. As I've already told you my air rifle is in the 11.5 ft-lb range, you can assume I do actually know how to calculate muzzle energy.

I'm occasionally a bit of an idiot, but not so much that I can't tell that 500 fps with a 5.7 grain steel BB is less energy than a faster 800 fps applied to a heavier 8.0 grain pellet.

thanks for the reply but what i dont understand is some co2 bb guns are 400 fps 350 fps etc.. and are using the same type of co2 cylinder but have less fps and some more fps what else has an effect on the fps are there springs? just trying to understand how the whole thing works thanks

fullyloaded wrote:thanks for the reply but what i dont understand is some co2 bb guns are 400 fps 350 fps etc.. and are using the same type of co2 cylinder

Factors such as barrel length (more distance to accelerate over) and the valve springs (using more gas per shot) will change things around.

However, bear in mind, different manufacturers will exaggerate (or sometimes understate) muzzle velocities by different degrees, so that can be responsible for some of the difference.

Do you even realy need that extra 20 fps? you wont notice any difference and i wouldn't risk going over the limit.

These type of guns vary in velocity based on the size and structure of the gas port from the valve to the barrel.
In most it is a non-optimized system which is why most "tweaks" are aimed at enlarging and smoothing the path the gas takes to meet the projectile.
You can explore this idea at http://www.bryanandac.com/
Particularly in the 22XX mod section which shows a cutaway view of a "Boss max flow" valve.
I actually wouldn't recommend messing around too much unless you like to ask for trouble.

thanks for the reply guys yeah if the extra 20 wont make much of a difference then there is no point and i don't want to risk going over the limit.
again thanks...