I asked the question below and it was suggested I call Umerex. I did and they said the Air Venturi bottles are not compatible. Sure enough, all 88/90 gram CO2 cylinders are not created equal. Some have a longer nipple (Air Venturi)than others. The longer nipple prevents proper seating against the O-ring. Has anyone else experienced this? Q. - The o-ring in my 850 failed to hold pressure so I ordered three new ones from Umerex. While screwing in a cylinder the new o-ring blows a second or two after the cylinder in punctured. I tried several times with another new o-ring with the same result. wtf?
I have seen it before with the Sig MPX/MCX, some guns seem less prone to have issues with the varied 88/90 gram cylinders than others.
The o-ring in my 850 failed to hold pressure so I ordered three new ones from Umerex. While screwing in a cylinder the new o-ring blows a second or two after the cylinder in punctured. I tried several times with another new o-ring with the same result. wtf?
I would contact Umarex about that. Does the o-ring hold pressure for a few seconds and then blow out? Or does it start leaking immediately when the cylinder is pierced?
Can you use an 1100 psi regulated high pressure air tank instead of the Airsource Co2 tank? I imagine you'd need an airsource to paintball thread adapter-are they available?
Folks have modified the stocks to accept the 13 cu in tanks, so it can be done. But at that point, you're getting to a point where you're putting a good amount of money into a gun that you could get the same features out of as the Umarex Gauntlet.
How long can you leave CO2 in the rifle?
It is not recommended to store the rifle with CO2 in it
Co2 leaks, where can I get replacement O-rings? I have. Ordered off of Amazon. It was a rip off
Give Umarex USA a call and if they won't give you the O-rings, at least get the sizing and you can likely find them either at a local hardware store or online.
Is the hammerli 850 good for a 8 year old kid.
From a bench, yes. Probably on the heavy side for a gun to carry around.
I don't plan to use the sights with this gun if I purchase it. I would mount a scope, and would like the lowest mount possible. Does anyone know if the front and rear sights can be removed so they don't obstruct the scope vision?
Yes both front and rear sights can be removed i removed the sight from mine and put grub screws in the holes where the sight screws were
I purchased a Hammerli 850. It shoots fine, except the magazine won't rotate went bolt is pulled back.
I dropped a little silicone lube by the mag indexer pawl that rotates the magazine, and mine works great now. Not one problem at all since.
Will 90 gram catridges work as well
Yes they will my Hammerli 850 had two 90 gram co2 what came with the rifle
My problem is when I screw the CO2 cylinder into the rifle, all the air is released before I get it totally sealed and my hand almost freezes. Could the O-ring be hard?
Change the Air Source O-ring, lube that o-ring with Pelgunoil
Where can I buy 88 gram co2 bottle seals for my Hammerli 850. in the USA online
can you get this rifle with the minelis stock?
Is it possible to transfer this gun to an aftermarket wooden stock?
Anyone have any idea what the barrel diameter is?
Would this rifle (in .22 cal.) be suitable for squirrel hunting under 25 yards?
Under 25 yards - yes
I just purchased a Hammerli 850 air magnum rifle and bought a Bushnell trophy xlt scope. What mounts should I buy?
Get a dovetail to weaver adapter mount. Use high see thru scope rings for weaver/pic rail so scope objective will rise above the front sight. For smaller than 50mm objective, use medium hight rings. Make sure to match rings to scope tube. . .1" etc. . .
How long can you leave a 88gram co2 cartridge in the gun once it's been punctured without it leaking out?
Indefinitely as long as you don't store in a open where it has a chance of getting to hot . Always use pelgun oil to keep the seals fresh.
There is on the internet a conversion unit which will allow a 12 gm CO2 cartridge to replace the 88 gm one. It is only 5 inches long. Would this allow changing the 12 gm cartridge without removing the adapter?
The adapter holds two 12gr co2's. The loaded adapter is used in place of the one 88gr co2. You must screw it in to use and screw it out to change co2's.
In the recommended accessories section below it shows the 2 / 12 gram Co2 adaptor it sells for 100.00 dollars.
Does someone make an affordable wood stock for the gun
Doubtful you would need to contact Hammerli to inquire?
How do you move front sight to adjust aim?
Just like setting elevation on your M4
opposite poi. Front post up, impact will be lower. Post down, impact higher. post left, impact right etc. Got it? The opposite way that the rear sight works.
This gun doesn't appear to have much recoil? Does that mean it could utilize most any scope rather than one made specially for air guns?
I second that answer.
Correct, you can use whatever you want.
Does the .177 come bundled with the scope
If you buy the ultimate bundle.
Will You Waste A Lot Of Co2 If You Are Only Going To Shoot About 50 Shots At A Time?
The 88gr can be left in the rifle for a few days. . .see above reply. Take out if storing rifle for lengthy period. I also aske this quest o on to the PR expert on the web site.
88 gram cylinders cannot be removed without losing all their gas. If you buy the 12 gram conversion cylinder, which takes 2 - 12 gram cylinders, it can be removed without loss of gas, and later on you can put it back in and shoot again without changing out the old 12 gram units.
yes because we don t recommend leaving CO2 stored in the gun
Can the magazine hold longer pallets like the Baracuda Magnum or JSB Exact Monsters?
No. . .best to stick with domes, wadcutters or hollowpoint. Recess pellets (pellet pen) inti the magazine.
Ok then how long can you keep the co2 cyl in the gun?
You can keep it there indefinitely as long as you don't store it in the open area where it has a chance to get too hot. Always use pelgun oil and that will ensure your seals are lubricated and will not dry out.
can you take out the co2 cartridge without losing the co2?
no, you cannot
What FPS can I honestly expect in 22cal?
Have not done chrony but both the .177 and .22 pack a pretty good accutate punch. I have used both on pest at short range up to 25yds. . .especially birds.
Specs say 655 fps usually pretty close to that figure , chrony to be sure.
you offer a compensator for this rifle will it make it quieter,more accuate in windy weather and do you have to remove the front sight to install
Electrical tape on the compensator will reduce noise level. The front sight has to be unscrewed and taken off. Under it when off you will see another hole further back to screw sight back on. The compensator will fit perfectly on and around the repositioned sight. Very easy to do. Or you can leave sight off altogether.
The compensator (#RWS-2251005) doesn't reduce the sound by itself, but if you cover the holes on the compensator (tape or big heat shrink tubing) the report is greatly reduced. Don't see how it would help in windy weather. I didn't have the front sight on when I mounted the compensator so I can't say for sure if it has to go.
Pyramyd doesn't offer anything like that.
what is the longest pellet the mag will take
Do not use pellets like Predator Polymags or any pointed pellets. Stick with standard 7-8 gr wadcutter, domes and/or hollow points like Crossman Beeman or H&N etc. Recess into magazine. Trust me. . .you DO NOT want a jam from an over extended too long pellet! 14.5 gr RWS Superdomes in .22.
in 22 it would be approx. .385 and in .177 .3 but the shape of the pellet will also be important for it to feed correctly so this is not a guaranteed size limitation.