Adam-RunningDog 1 Posted December 13, 2008 Author Report Share Posted December 13, 2008 but for the lighter pellet in a springer and a heavier one in a air rifle it shouldnt make a difference if the gun is putting the same power out as spring or PCP the heaver or the lighter the pellet shouldnt make a differnce to the gun it is the same sort of force couming out of a similar manufactued tool the light or heavier pellet shouldnt make a difference i cant see the sence in this. my post might not of made sence but i cannot see the sence in this. Quote Link to post
masmiffy 82 Posted December 15, 2008 Report Share Posted December 15, 2008 I think this how it goes re heavier / lighter pellets and 12 ft lb. If you 'tune' a pcp to give bang on 12ft/lb with say AA field (a 16.4 grain pellet) then shoot same gun with Bisley magnums (approx 22 grains) the ft/lb will be in excess of the 12 ft/lb 'legal' limit. I think the reverse of this is true for springers. ie heavy pellet tuned to 12ft/lb gun will be over on lighter pellets? Also am fairly sure that plod have to test any gun with the pellets you are using at the time? Perhaps Decker may know different! Quote Link to post
cbw 4 Posted December 15, 2008 Report Share Posted December 15, 2008 Deker, Do you know nothing!!!! Come on man get with the program!! As I was explaining to my daughter this morning, Father Christmas comes down the chimney by MAGIC!!! Some people????? CBW Quote Link to post
Thorburnlad 0 Posted December 15, 2008 Report Share Posted December 15, 2008 magic dust lol Quote Link to post
chimp 299 Posted December 15, 2008 Report Share Posted December 15, 2008 i tried this only a couple of weeks back on both springer and pcp . masmiffy is right . dont know why but it did Quote Link to post
Deker 3,453 Posted December 15, 2008 Report Share Posted December 15, 2008 Guys I do not understand this, I see no logic in it, and all being equal I see no way it can be correct ..hence why I started this thread and I'm still waiting for someone to explain the physics! Until then I remain unconvinced!!! On a PCP the heavier the pellet the greater the ft/lb On a springer the lighter the pellet the greater the ft/lb What is this all about and where has it come from...this is news to me and is being banded around as reality. How and why????...can someone please explain! Cheers Pellet suitability, PCP...Springer Options Track this topic Email this topic Print this topic Download this topic Subscribe to this forum Display Modes Switch to: Outline Standard Switch to: Linear+ Deker View Member Profile Add as Friend Send Message Find Member's Topics Find Member's Posts Dec 13 2008, 03:28 PM Post #1 Extreme Hunter Group: Members Posts: 2236 Joined: 10-September 07 From: Berkshire Member No.: 10759 Warn: (0%) On a PCP the heavier the pellet the greater the ft/lb On a springer the lighter the pellet the greater the ft/lb What is this all about and where has it come from...this is news to me and is being banded around as reality. How and why????...can someone please explain! Cheers -------------------- Assuming KILLS Full Edit Quick Edit jazz_11 View Member Profile Add as Friend Send Message Find Member's Topics Find Member's Posts Dec 13 2008, 03:47 PM Post #2 Mega Hunter Group: Members Posts: 616 Joined: 20-February 08 From: South Wales Member No.: 15872 i dont know mate to be honest but when i was in litts the other day buying air arms diablo pellets the guy said becareful about the ft/lb of your rifle as the police force use very heavy pellets which increases the ftlb and therefor even if you gun is under 12 with your current pellets, if the police test it, it is likely to be over which is why most new guns are around the 11.4 mark. hope it helps cheers jazz -------------------- 2 working ferrets Carlsberg & Fosters JAKE- my English springer spaniel. Love hunting and beating with the dog. Air Arms S410 Roses are red Violets are Blue watchout bunnies im comming for you! riohog View Member Profile Add as Friend Send Message Find Member's Topics Find Member's Posts Dec 13 2008, 03:54 PM Post #3 Mega Hunter Group: Members Posts: 371 Joined: 6-July 08 From: midlands Member No.: 20594 i think weight xvelocity gives ft lbs energy Deker View Member Profile Add as Friend Send Message Find Member's Topics Find Member's Posts Dec 13 2008, 04:02 PM Post #4 Extreme Hunter Group: Members Posts: 2236 Joined: 10-September 07 From: Berkshire Member No.: 10759 Warn: (0%) QUOTE (jazz_11 @ Dec 13 2008, 03:47 PM) i dont know mate to be honest but when i was in litts the other day buying air arms diablo pellets the guy said becareful about the ft/lb of your rifle as the police force use very heavy pellets which increases the ftlb and therefor even if you gun is under 12 with your current pellets, if the police test it, it is likely to be over which is why most new guns are around the 11.4 mark. hope it helps cheers jazz ....a heavier pellet carries its energy better than a light one...that's why I would like someone to tell me where the opening statement has come from and what it is based on!! Cheers I don't understand this, but IF it is true then someone can explain it....any offers??? -------------------- Assuming KILLS Full Edit Quick Edit Deker View Member Profile Add as Friend Send Message Find Member's Topics Find Member's Posts Dec 13 2008, 04:12 PM Post #5 Extreme Hunter Group: Members Posts: 2236 Joined: 10-September 07 From: Berkshire Member No.: 10759 Warn: (0%) QUOTE (riohog @ Dec 13 2008, 03:54 PM) i think weight xvelocity gives ft lbs energy The formula to calculate ft lb is.... speed (feet per second) x speed x weight (g) of pellet, divided by 450240. But this does not explain the statement in my original post!! -------------------- Assuming KILLS Full Edit Quick Edit « Next Oldest · Airgunners, Spring & Precharged · Next Newest » Quote Link to post
Sterry 0 Posted December 15, 2008 Report Share Posted December 15, 2008 I'll speak to my Science teacher..hes got a PHD in Physics. lets hope he can shine a light on this predicament. Quote Link to post
chimp 299 Posted December 15, 2008 Report Share Posted December 15, 2008 well im not a liar and i tried it with an fx springer and stealth. my chrony must be wrong Quote Link to post
masmiffy 82 Posted December 16, 2008 Report Share Posted December 16, 2008 velocity x velocity divide by 1 million x 2.222 x bullet weight = ft/lb Get a chrony and try it! Oh and I was with chimp when he tried the heavy / light pellet thing with his chrony and pcp and springer! Quote Link to post
Deker 3,453 Posted December 16, 2008 Report Share Posted December 16, 2008 Ok... you guys may have achieved these results, but chucking a pellet or two down a gun is not scientific and not represenatative..the difference in heavy light pellets could easily be achieved from bad seals or a marginally tighter pellet/barrel fit, poor barrel condition..etc etc..2 swallows do not a summer make! Like for like I see no reason for the results you suggest! There is simply no logic to it. I still await a scientific explaination for what you say or a controlled test, until then I remain unconvinced! Quote Link to post
Sterry 0 Posted December 16, 2008 Report Share Posted December 16, 2008 velocity x velocity divide by 1 million x 2.222 x bullet weight = ft/lb Get a chrony and try it! Oh and I was with chimp when he tried the heavy / light pellet thing with his chrony and pcp and springer! Where did the 1,000,000 come from? i been lookin and Ft/lbs = (fps X fps X mass (grains)) / 450240 i think this woul be more likely as it similar to the momentum in my understandin. This is where i found this Quote Link to post
ghillies 209 Posted December 17, 2008 Report Share Posted December 17, 2008 once your into FAC a heavier pellet lets you up the fp's whilste keeping the velocity this side of the sonic boom..(speed of sound). at 12fp levals heavier the pellet the slower it goes.. but yu cant up the velosity because it'll up the fp's to over 12fp. Quote Link to post
masmiffy 82 Posted December 17, 2008 Report Share Posted December 17, 2008 velocity x velocity divide by 1 million x 2.222 x bullet weight = ft/lb Get a chrony and try it! Oh and I was with chimp when he tried the heavy / light pellet thing with his chrony and pcp and springer! Where did the 1,000,000 come from? i been lookin and Ft/lbs = (fps X fps X mass (grains)) / 450240 i think this woul be more likely as it similar to the momentum in my understandin. This is where i found this Was given this by a gunsmith who worked for Holland & Holland, perhaps he is wrong eh? Quote Link to post
Deker 3,453 Posted December 17, 2008 Report Share Posted December 17, 2008 velocity x velocity divide by 1 million x 2.222 x bullet weight = ft/lb Get a chrony and try it! Oh and I was with chimp when he tried the heavy / light pellet thing with his chrony and pcp and springer! Where did the 1,000,000 come from? i been lookin and Ft/lbs = (fps X fps X mass (grains)) / 450240 i think this woul be more likely as it similar to the momentum in my understandin. This is where i found this Was given this by a gunsmith who worked for Holland & Holland, perhaps he is wrong eh? This is the formula which I posted earlier in this thread as well.... The formula to calculate ft lb is.... speed (feet per second) x speed x weight (g) of pellet, divided by 450240. ....no idea if the 1million thing works or produces the same answer...try the maths and see..may just be another way of getting the same answer! Quote Link to post
donnyc 1,203 Posted December 18, 2008 Report Share Posted December 18, 2008 A springer delivers its air almost instantly and its hot air after @7 inches thats it ,its reached its maximum fps ..after that it slows.Thats why springers as a whole have shorter barrells..A PCP delivers cold air and it accelarates the full length of the barrell .Put a longer barrell on a PCP and performance inproves the opposite in a springer...If in doubt dont argue try for youself. Quote Link to post
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