Thanks Mark that's very kind of you to do a graph would like that a lot thanks Just a couple of questions for you all When filling a Air Arms S400 up with air when completely empty I think you have to cocked the bolt prier to filling is this right ? Also do I have to cocked the bolt as well when jus...

Hi all ok s400 as had her seals renewed and the firing pot/valve spring and firing valve all were brand new and set up as per post to 57mm also her air Cylinder as been polished inside by a friend who had A polisher bit welded to a drill bit he uses it for polising us springer cylinders well he gave...

Hi, JSB Heavies (Daystate Heavies also I believe) at 10.3 grains are a good pellet to set power levels with. I would set it to 715 fps maximum (11.65 ft.lbs) to give a bit of legal clearance and you will be ok with Diablos which should be around 11.2-11.3 ft.lbs. If you are using Bisley Magnums the...

Ben Taylor used to grease the inside of his to hold any particles that may have got in. The later filling valves stopped 99% of crap getting in BBF Thanks for post but I think I'll leave it bone dry and as you say let fill valve fitter do its job I'll only be filling her with fresh divers air from ...

The condition of my air cylinder was the same as yours. 2012 date of manufacture and only filled from a drivers cylinder. I left mine as it was because my theory being a sticky surface on the inside of the cylinder will hold any dirt or dust and stop it from going through into the guns mechanism. M...

Hi every one just a quick one (as my wife always complains ) this is a follow on from my post "firing pot" as said in post all new parts have been sent for and full "O" ring set orderd The inside of her air cylinder seems to be very dirty oily and may even be as speckel of rust b...

http://www.uttings.co.uk/p103514-bisley-magnum-177-pellets-x-500-bima177p/#.V9SWtpgrKUk Thanks Raj I'm trying to get every thing together including these heavy pellets I will buy what you recormend as they say you are a Gru on all Air Arm Air rifles grovel, grovel. Now please tell me what pellet sp...

Hi, If the valve has been in the rifle for a few years it's best to change it anyway. They can suffer from extrusion and form a step on the sealing face of the valve. A new valve will give a better power curve and thus more usable shots. It's item 4 in the above diagram. While it's apart give the h...

Thanks Mark for your advice I was thinking of Renewing all of that section so you think renew just the firing valve plunger well we will see when I crack her open She is a 177 so what would be classed as heavy pellet in the 177 range to test her after she's fixed I have a chronograph so test her at ...

Thanks 10 yes a better Diagram alot clearer can see now what's what Thanks Roger5 I'm going to take your advice strip her down see what I can see it may be just a case of crud And crap over the years how it gets there I do not know as this s400 was going for a song and we'll I thought spend a few bo...