Co2 Walther cp3, perfect PCP alternative.

[MrChipShoulder]

Hi,

I had to sell my new Steyr Evo10 recently, but didn't want to be without a pistol. After many PM's, emails, threads and advice, I ended up buying this Co2 Walther CP3 pistol. I knew nothing about bulk Co2 a week ago, but now after some advice, all is sorted and working well.

There is almost nothing on the net about bulk Co2 guns, so hopefully this little post may help others looking for pistol options?

Bulk filling a Co2 canister is as simple as :-

Put the pistol cylinder in a bag and into the freezer for 1/2 an hour to drop the temp of the cylinder,
Screw the adaptor that came with the pistol into the Co2 fire extinguisher in the same way as a PCP air tank,
Remove the pistol cylinder from the freezer and screw it onto the adaptor in the same way as a PCP air tank,
Depress the fire extinguisher handle for about 10 seconds, you will hear the Co2 stop flowing,
You can leave the handle depressed as long as you like as Co2 will find its own level,
Unscrew the cylinder from the extinguisher and fit to pistol.

Done, it really is that easy, it's very similar to PCP in most respects

Here is a little extra info that is useful to know, and this can be found stamped onto a pistol Co2 cylinder. One is the weight of the empty cylinder, in my case .381 Kg. The other number is the weight of Co2 the full cylinder can/will take on, In my case 0.053 Kg. I weighed mine empty and it was indeed exactly 0.381 Kg and after a Co2 'fill', I got an increase of .047 Kg. So I was technically .006 Kg under filled; however, Co2 apparently needs space in the tank and an over filled or totally full Co2 cylinder will struggle to discharge, so a little short is a good thing.

On a more personal note, below is the pistol I bought, my pistol clamp for testing and the result after a 5 shot group at 10M. Don't worry where the group is, it's the size of the hole that matters. The hole can be moved in the sight picture and on open sights, it's all subjective anyway !!

https://ibb.co/VxDnpxG
https://ibb.co/yBS3Ff0
https://ibb.co/cQXSxsT
https://ibb.co/7n6b5pL
https://ibb.co/L86GhjS
https://ibb.co/ChGBqxd

To say I am happy is an understatement and more than happy to use Co2 as an alternative to an expensive PCP pistol. My 2Kg Co2 fire extinguisher cost me £23 delivered from the Bay, maybe not the cheapest way to buy Co2, but considering other costs of getting and maintaining a 'real' Co2 bottle, this historically tried and tested method is ideal for fairly low pistol usage. An extinguisher has the added advantage of having its pickup tube going to the bottom of the bottle, so there is no need to turn the bottle upside down or lay on its side like you may need to do with an 'ordinary' Co2 bottle.

I am by NO MEANS a Co2 expert, I have learnt all this info over the last few days from other much more qualified shooters.
I have only put this short note up to try and help others looking for info on Co2.
Hopefully others will add to this info for future reference.

[nige346]

The Walther CP series were superb pistols, CO2 is in many ways easier to shoot than PCP making for very forgiving pistols, I've shot all the CP series my favourite being the CPM-1, a somewhat odd looking pistol with its vertical cylinder but superbly balanced and able to produce great results, Bulk fill CO2 seems to put a lot of people off but is actually very simple & does give the advantage of bargain "top end" pistols being available.

[wilbydoughboy]

I have been using a Co2 Steyr rifle for a few years and have found that if the fire extinguisher is kept in a warm place ( I keep mine in the airing cupboard ) it helps to give a full fill. I also use some silicone grease to lubricate the seals and have found that when the fire extinguisher gets down to the last 1/4 full it wont give a full fill.

[zooma]

I was the happy previous owner (twice removed!) of your CP3 and it is a superb pistol to shoot - far more forgiving than your Evo10 so your scores are unlikely to suffer and (once you have had some time to get used to it) they could even improve!
Smart choice !

[1066]

Pleased you're up and running - I like the clamp/rest, ideal for pellet testing.

I shot these groups with my CP-2 at 10m from a clamp. The bottom groups are all 5 shot groups. The top group is eight shots, two of each type - really shows the pistol will easily hold the ten ring with plenty of different pellets but groups can be tighter if you take time to select the correct ones for the pistol.