HectorThanks-exactly what I was looking forCharliePS What search term/terms did you use.I just searched again and the only hits were MY post and your post-not the great post with the infoI used chamber diameter zero threadsdiameter-found my your postHow did you find that post? search term used??double thanks-
Quote from: DOKF on February 11, 2016, 03:59:04 AMAn even better read is the followup paper that details more about bounce, including spring reverb and vibration showing how a shockwave is sent back along the spring when the piston collides at the chamber end. Good pictograms from the simulation studies.I got lost in the differential equations... Never got past Trig and Analytic Geometry.You have a link to the follow up paper, or is it right there with the first one?
An even better read is the followup paper that details more about bounce, including spring reverb and vibration showing how a shockwave is sent back along the spring when the piston collides at the chamber end. Good pictograms from the simulation studies.
Quote from: DOKF on February 11, 2016, 03:59:04 AMAn even better read is the followup paper that details more about bounce, including spring reverb and vibration showing how a shockwave is sent back along the spring when the piston collides at the chamber end. Good pictograms from the simulation studies.Kim;Stija's post was about the existence of the rebound. So the first of Domingo's papers was the one to suggest. Yes the second explores why people should be wary of guns without a spring guide (which is usually the case with low powered, end of the low spectrum guns, but that in recent years has been creeping up because designers want to use the same design for Gas Struts/Gas Springs and metal coil spring powered guns).Thanks for pointing that second paper to the community.Keep well and shoot straight.Héctor
Quote from: rudeboy on February 09, 2016, 03:44:02 PMQuote from: Yrok on February 08, 2016, 09:16:41 PMCan pellets be too heavy for a particular springer? YES! Can pellets be too light for a particular springer?YES!Can this damage the springer?YES!How long do you want YOUR springer and/or scope to last and shoot accurately?YOUR CHOICE!If I read this answer I'm almost afraid to even use my springer at all LOL I go for Benjihunter's answer: Use the pellets that gives you best accuracy.And the Baracuda's are fine...LOL!!! I'm laughing because my eldest brother, who got me on this slippery slope, recently chastised me for all the shooting I do in my basement with my air guns. He said "You're going to wear out your guns if you keep shooting them like that." I looked him straight in the eye and said, "I want to be known as the guy who wore out his air rifle!" I got into this hobby to SHOOT, not to have bunch of guns to look at in their racks. If I destroy a spring here or a seal there, that's the opportunity I look forward to in order to learn how to replace the worn out parts. FWIW, my Benji's like heavier pellets...they seem to group better, and have more retained energy at distance for the units I hunt with. The dead squirrels attest to that. Look at Chairgun Pro and run your numbers is you're going to hunt your gun. Energy at distance is important for humane kills.I can hardly wait until I break/wear out my very first air gun. LMBO!!!It's all about having fun, and I'm having a blast. I respect the input from the seasoned veterans here, but I guess this old guy is just concerned with having a good time and learning something new every day. YMMV.
Quote from: Yrok on February 08, 2016, 09:16:41 PMCan pellets be too heavy for a particular springer? YES! Can pellets be too light for a particular springer?YES!Can this damage the springer?YES!How long do you want YOUR springer and/or scope to last and shoot accurately?YOUR CHOICE!If I read this answer I'm almost afraid to even use my springer at all LOL I go for Benjihunter's answer: Use the pellets that gives you best accuracy.And the Baracuda's are fine...
Can pellets be too heavy for a particular springer? YES! Can pellets be too light for a particular springer?YES!Can this damage the springer?YES!How long do you want YOUR springer and/or scope to last and shoot accurately?YOUR CHOICE!
Hey Charles, This maybe a dumb question but my concern with the too wide pellets (especially in break barrels) is the residue I get from closing the breech. I've even stopped using some types because of the damage to the pellet skirt and left over lead in the breech itself.Wouldn't this cause a minute change in the weight of the pellet itself? and this coupled with the possible deformity of the pellet lead to inconsistent shooting?perhaps i'm pulling hairs but I am curious.
In a properly chamfered breach, the skirt is not quite fully inserted into the bore, and it requires pressure to "pop" the skirt passed the chamfer. That allows peak pressure to build, boosting velocity. With heavier ammo, in some guns you may have increased rebound and oscillation... maybe a pellet seat that fully inserts the skirt into the bore can make up for that. Maybe even with the right balance of weight, you can still get it moving at peak pressure with minimum rebound and oscillation?. Presuming you actually found that absolute perfect balance. It would probably be darn near impossible to find a pellet that balances this perfectly and adjust it that well. That's why you have to let the rifle choose the pellet, and then adjust the gun- then sometimes pellet test again if you are that compulsive about finding extreme optimum performance. But, you can't just pick a pellet and fiddle with it and make it work. I mean, you probably can, but it won't be near optimum performance. I would much prefer to test a handful of pellets during break in, and hold what I've got after a tune unless accuracy falls off. But anyway, my point is, that a pellet seat tool might open up some new options for a given rifle. Maybe even a necessity for a rifle without a chamfered breach, especially with a tight bore.
BryanHGood point-you have to search for the right pellet.I just closely looked at my 460and where the receiver meets the barrel-the sliding "bolt" is deeply countersunkand there is a seal-light blue-translucent-that actually meets the pelletNOT metal to metal -it is pellet skirt to synthetic "plastic/rubber"-I don't have a break barrel-but on my 460 -just as you say-the skirt sticks out maybe 1/2mm 1/4mm -enough to see easilyLuke-on your break barrel-what actually meets the pellet-seals it-where it meets the "bolt"-metal or something soft-like a seal?as you say-shaving pieces off the pellet skirt-That CAN'T be rightOh-the chamfer on the 460-is there-but via eyeball-it is very subtle -drop pellet in-and it is obvious-no pellet-tough to see that very slight taper-flareLuke could your barrel be maladjusted-or is some seal cockeyed-my 460 has a nice seal meeting the skirt-no metal(might be why it is pricy-the counter sunk bolt-and the nice seal-and that nice trigger-and the nice wood-heck-lotta reasons it isn't cheap)
39mThanks.My under levers seal right at or around the pellet-
Advertise Here
Share This!