Looks like fun. Checked locally and found a couple interest groups but no scheduled events -all powder shooters here. Found my one-piece scope set up took care of eye relief problem but very little space to load pellets. Hawke has what I need in 2 pieces and should have them next week - bought on eBay. Iâll be watching your progress - looks like the CP2 has some things in common with the Diana line. Election is over - Elon Musk will be with Trump working to eliminate waste in government. Shouldnât have any trouble finding it but rooting it out will be the challenge. What a beautiful part of the country you live in. Darwin
Hi Darwin, yip I am looking forward to the challenge for sure. The Artemis CP2 and Diana Chaser are basically identical except for the bolt is a little different. Some countries with power restrictions also use a smaller transfer port but otherwise identical
Salut, j ai enlevÃĐ 2 spires sur un ressort similaire a l original, et j obtiens 8,5, joules en 0.55 avec le canon long, pour une meilleure prÃĐcision et plus de 62 tirs efficace
Hello Tyrone, Just a thought, the temperature of the CO2 bulb and all the gas passages will drop as you shoot the string, maybe try taking longer between shots to allow the temperatures to normalize? Saying that, maybe this would stretch a benchrest detail to a couple of hours! It is baltic here in North Scotland and snowing, I will have to keep the gun in my pocket to get any power! Before firing of course! Aim small, Norm.
Hi Norm, yes this would be a challenge in very cold temps. I tried to take at least 20-30s between shots. In the actual benchrest shoot you get 20min to shoot 25 targets.
I reckon on 65 good shots before that obvious drop off at end of capsule. I have tuned for just under 650fps and the spread is practically level from shot 1 to shot 65, a spread of 3fps. The velocity does vary a little with temperature but not much when it is self-regulating; when the pressure in the valve is lower, the hammer opens it for longer. It is now heading into winter and too cold in England to test CO2. Your velocity may be set too high at 675fps and the CO2 valve is not self-regulating. The only way I have found for really fine-tuning is on the brass transfer port, take a small one and incrementally open it until it gets to optimum and then goes off; then make a new transfer port to optimum spec. Yes, the pellet/weight does matter, I had to choose the pellet to optimise on.
Hi Jeff, Thanks for your insights. Well I am currently no where near 65 shots I am still busy playing around. My next move is to decrease the TP to 3mm and see what happens. In the background I have been testing some pellets as well just to give me an idea and it doesn't look promising yet so going to need to broaden the pellet range. If I can end up with 40 consistent shots I will be happy
@@African-Budget-Pellet-Gunner I think I am at 3.6mm by trial and error (using a tapered reamer) with the ends flared but the barrel itself left alone. I have gone to some trouble to ensure the airgun is airtight. I have "standardised" on two pellets which are practically identical; not the very best but a more reasonable price. What works in mine probably wont work in the next one, airguns are that fussy with pellets. They're 0.56 gram.
Great Vids : Thanks For Your Efforts ð Any infos (video avail or could you do a video) upon hammer spring and action noise reduction ? The air is mouse fart quiet but OMG the whole hammer action makes such a backyard unfriendly racket ðð
Haha, you haven't shot a springer in a while ð. You could use the same concept as a springer, to shim the hammer spring inside the hammer, that would reduce the hammer spring noise. For the bolt cocking, you could adjust the play of the bolt but I don't think it will make any difference to the sound of the hammer engaging with the trigger seer.
@@African-Budget-Pellet-Gunner thanks : added a small rubber washer that fits inside hammer; bonus also preloads hammer spring a bit ... shim : hmm what's laying around the house
Statistics eh? We only need a sample size of 6 to get 5 degrees of freedom to give us a valid estimate of the population i.e we don't need to shoot dozens of pellets to estimate the spread. Nor do they need to be consecutive shots but random samples during a shooting session e.g. one from every magazine load.
Looking forward to seeing the progress. Nice start.
Thanks glad you're enjoying it, holding thumbs the plans work out
Looks like fun. Checked locally and found a couple interest groups but no scheduled events -all powder shooters here. Found my one-piece scope set up took care of eye relief problem but very little space to load pellets. Hawke has what I need in 2 pieces and should have them next week - bought on eBay. Iâll be watching your progress - looks like the CP2 has some things in common with the Diana line. Election is over - Elon Musk will be with Trump working to eliminate waste in government. Shouldnât have any trouble finding it but rooting it out will be the challenge. What a beautiful part of the country you live in. Darwin
Hi Darwin, yip I am looking forward to the challenge for sure. The Artemis CP2 and Diana Chaser are basically identical except for the bolt is a little different. Some countries with power restrictions also use a smaller transfer port but otherwise identical
very interesting ,well done
Thanks glad you enjoyed it, part 2 we will see if we can put the theory into practice.
Salut, j ai enlevÃĐ 2 spires sur un ressort similaire a l original, et j obtiens 8,5, joules en 0.55 avec le canon long, pour une meilleure prÃĐcision et plus de 62 tirs efficace
Awesome thanks for sharing, I will keep it in mind going forward
Hello Tyrone,
Just a thought, the temperature of the CO2 bulb and all the gas passages will drop as you shoot the string, maybe try taking longer between shots to allow the temperatures to normalize?
Saying that, maybe this would stretch a benchrest detail to a couple of hours! It is baltic here in North Scotland and snowing, I will have to keep the gun in my pocket to get any power!
Before firing of course! Aim small, Norm.
Hi Norm, yes this would be a challenge in very cold temps. I tried to take at least 20-30s between shots. In the actual benchrest shoot you get 20min to shoot 25 targets.
Commando man, ken they wee disposable handwarmers aye?
Ah'll say nae mair on it ð
@@OldNavajoTricks Ha Ha, nice yin!
I reckon on 65 good shots before that obvious drop off at end of capsule. I have tuned for just under 650fps and the spread is practically level from shot 1 to shot 65, a spread of 3fps. The velocity does vary a little with temperature but not much when it is self-regulating; when the pressure in the valve is lower, the hammer opens it for longer. It is now heading into winter and too cold in England to test CO2. Your velocity may be set too high at 675fps and the CO2 valve is not self-regulating. The only way I have found for really fine-tuning is on the brass transfer port, take a small one and incrementally open it until it gets to optimum and then goes off; then make a new transfer port to optimum spec. Yes, the pellet/weight does matter, I had to choose the pellet to optimise on.
Hi Jeff, Thanks for your insights. Well I am currently no where near 65 shots I am still busy playing around. My next move is to decrease the TP to 3mm and see what happens. In the background I have been testing some pellets as well just to give me an idea and it doesn't look promising yet so going to need to broaden the pellet range. If I can end up with 40 consistent shots I will be happy
@@African-Budget-Pellet-Gunner I think I am at 3.6mm by trial and error (using a tapered reamer) with the ends flared but the barrel itself left alone. I have gone to some trouble to ensure the airgun is airtight.
I have "standardised" on two pellets which are practically identical; not the very best but a more reasonable price. What works in mine probably wont work in the next one, airguns are that fussy with pellets. They're 0.56 gram.
Great Vids : Thanks For Your Efforts ð Any infos (video avail or could you do a video) upon hammer spring and action noise reduction ? The air is mouse fart quiet but OMG the whole hammer action makes such a backyard unfriendly racket ðð
Haha, you haven't shot a springer in a while ð. You could use the same concept as a springer, to shim the hammer spring inside the hammer, that would reduce the hammer spring noise. For the bolt cocking, you could adjust the play of the bolt but I don't think it will make any difference to the sound of the hammer engaging with the trigger seer.
@@African-Budget-Pellet-Gunner thanks : added a small rubber washer that fits inside hammer; bonus also preloads hammer spring a bit ... shim : hmm what's laying around the house
@Marco-kw2do it will help a little
Very interesting and informative. Thanks Tyrone !
Btw , where do get the 3mm TP ? ð
Hi Klee, I guess you'll need to watch part 2
â@@African-Budget-Pellet-Gunner Hahaha , just watched ! ð ð
Statistics eh? We only need a sample size of 6 to get 5 degrees of freedom to give us a valid estimate of the population i.e we don't need to shoot dozens of pellets to estimate the spread. Nor do they need to be consecutive shots but random samples during a shooting session e.g. one from every magazine load.