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PostPosted: Mon Nov 14, 2016 1:28 pm 
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OK i know the formula, but heres the thing. With a light pellet say 13.4 gr you get 700 fps thats 14.58 ft lbs. However using the same gun using a 25.4 gr you get 570 fps thats 18.33 ft lbs. So if you were using various weights in between, you get different ft lb energies. So how would you advertise the gun ? Im assuming a 35 gr pellet would be over 20 ft lbs maybe even 22 or 23 or even higher. so how would you advertise a gun using ft lb energy instead of pellet speed ?

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PostPosted: Mon Nov 14, 2016 1:43 pm 
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The basics to advertising Speed first FPS energy being second. So Speed/ FPS sells sooner then Energy/ FPE/ Joules. Thats why is listed as such. IMHO

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PostPosted: Mon Nov 14, 2016 2:49 pm 
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That bieng the case, a lighter, or alloy pellet will likely produce a lot of speed, but not much energy. I have heard of a 10 gr 22 cal pellet, so would it be safe to assume it is an alloy pellet ?
The speeds and energy are what Im getting with my ssp, so Im trying to determin what measurement is better for first impressions. Perhapse Ill just do both. I would love to have some 30+ gr pellets to test though for ft lb energy.

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PostPosted: Mon Nov 14, 2016 5:14 pm 
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An observation from someone interested but with very limited experience in such things.
Would it not depend on what said purchaser wanted it for? ... such as target or hunting.
With that said, advertise as Whitewolf suggested, however, list both light weight pellet to show speed, (flatter trajectory for target), and the heavier pellet to show FPE for hunting.
No idea if this helps the conversation or not, just an observation from my perspective.

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PostPosted: Mon Nov 14, 2016 7:22 pm 
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I would think for a ft-lbs rating, use a medium weight, maybe anything from 18-22 grains, that would give the best combined fps and ft-lbs and I would advertise that.

Have you read this article? I found it to be a good read, I may have to re-read it tonight.

http://www.pyramydair.com/blog/2012/05/ ... t-weights/


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PostPosted: Mon Nov 14, 2016 7:48 pm 
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While that article is interesting, it refers only to spring piston guns. A single stroke pneumatic, is a horse of a different color entirely. Heavier pellets produce more ft lb energy in my gun. although the lighter pellets travel nearly 150 fps faster, they only produce a little over 14 ft lbs. compared to the 25.4 gr at over 18 ft lbs. I had some EunJin 32 gr a while back, but they were not accurate. So I just left them on my bench. Maybe there are still some there. Ill look tomorrow. Cheers

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PostPosted: Mon Nov 14, 2016 8:05 pm 
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Impressive gun, and Good catch. It was a while ago that I was looking at that article. I should have read it first :oops:


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PostPosted: Wed Nov 16, 2016 10:05 pm 
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Location: United States
Don't forget they lie too. So they use the light alloy to claim max velocity, light lead to make a good lead #, then sometimes they list a ftlbs energy. Take Crosman for example, their std B18 nitro gun makes ~16ftlbs energy out of the box, but that # varies quite a bit due to flaws. Now their cheaper nitro models and the Trail Hardwood are all the same internally, but they list the cheaper guns as having less velocity and power, like 18ftlbs which is possible but the norm. Then step up to a mid range or higher gun and it's 21ftlbs (possible but very unlikely), then the Trail hardwood is 23ftlbs (not possible). So picture it from an advertising perspective preying on kids (including full grown kids) who want that max power. The Trail is twice the price but probably didn't cost much more from China, so stretch the truth a bit and sales and profits are good. Hell, even the Trail All Weather which is the exact same Trail but with a synthetic stock is rated at 21, do they expect us to believe wood make it more powerful? If anything the syn stock would b/c it's much heavier. But the point is they lie to make $.
As you probably figured out a springer is made to work with a specific pellet weight for the caliber, so heavier pellets will cost you power, and at some point the gun will be so out of tune the pellets will come out at random speeds. I usually choose a pellet that's the heaviest w/o losing too much or any power so I get good BC and accuracy too, Or go a bit further in weight to control speed a bit.


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PostPosted: Thu Nov 17, 2016 5:26 am 
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I wish to be honest with my claims regarding power and speed. The best solution for me is to list both, but not finite numbers. Instead I will state (Up to) a certain speed and power. Depending on pellet weight.

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PostPosted: Thu Nov 17, 2016 2:18 pm 
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A fps and/or fpe range depending on pellet used, sounds like a good idea, Joe.

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