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Why I believe coaxials are opposite of what is best fps etc.

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: MrCrowley » Sun Apr 11, 2010 7:42 pm

IMHO When things less than a pound move, the best comparative weight system is grains. because it is always a whole number with no decimals.

What is 12 grams in grains?

12 grams = 185.1883 grains
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Unread postAuthor: boyntonstu » Sun Apr 11, 2010 7:49 pm

MrCrowley wrote:
IMHO When things less than a pound move, the best comparative weight system is grains. because it is always a whole number with no decimals.

What is 12 grams in grains?

12 grams = 185.1883 grains


Touche!

However, was there ever a bullet that was manufactured that weighed 12 grams?

http://www.internetarmory.com/rifle_hunting.htm


and:

http://www.chuckhawks.com/hunting_bullet_guide1.htm


6mm caliber (.243" diameter) bullets weighing less than about 85 grains are almost always varmint bullets, not intended for big game hunting. 85-87 grain bullets may be either varmint or big game bullets. Bullets of 90-99 grains are usually intended for small to medium size CXP2 game, such as pronghorn antelope, Colombian blacktail deer, and whitetail deer. Bullets in the 100-110 grain range are normally intended for the largest species of CXP2 game, such as wild sheep, mule deer, and caribou.

.25 caliber (.257" diameter) varmint bullets usually weigh 87 grains or less. The 100 grain bullets are usually for small to medium size CXP2 game. 115 to 120 grain bullets are usually the best choice for all-around use on CXP2 game, with the long 120 grain bullets generally preferred for the largest species, such as caribou and black bear.

6.5mm caliber (.264" diameter) bullets of less than 100 grains are usually varmint bullets. 100 grain bullets are often designed for the smallest species of "big game," such as European chamois and the smallest African antelope. The 120-130 grain bullets are usually a good choice for medium size CXP2 game, such as pronghorn antelope, most deer species, wild sheep and goats. The 140 grain bullets are the all-around bullets, suitable for all CXP2 and the smaller species or CXP3 game, while the heavy 156-160 grain bullets are usually intended for CXP3 game on the order of Scandinavian moose.

.270 caliber bullets (.277" diameter) bullets weighing 110 grains and less are usually varmint bullets. The new 115 grain Core-Lokt Ultra bullet designed by Remington for the 6.8mm SPC cartridge is a CXP2 game hunting bullet.

The popular 130-150 grain slugs are useful for a wide variety of CXP2 and CXP3 game, depending on the individual bullet's design, in the standard .270 Winchester cartridge and the .270 Magnums. I generally recommend 130 grain bullets for all CXP2 game, the 140 grain bullets for mixed bag CXP2 and CXP3 hunts, and the 150 grain or heavier bullets primarily for CXP3 game.

I also tend to prefer 130-140 grain bullets in the standard .270 Winchester and 140-150 grain bullets in the .270 Magnum calibers. But I would be the first to admit that controlled expansion 130 grain .270 bullets have been used successfully on the largest antlered game all over the world for decades, from both standard and magnum caliber rifles.

7mm caliber (.284" diameter) bullets weighing less than 120 grains are usually varmint bullets, while 130-140 grain bullets are normally suggested for CXP2 game. 139-140 grain bullets are a good all-around (CXP2/CXP3 game) choice in the standard 7mm calibers, as are 150-160 grain bullets in the 7mm Magnum calibers. The 175 grain bullets are usually reserved for use on the very largest or dangerous game.


Notice the mixture of whole number grains and decimal inches.
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Unread postAuthor: MrCrowley » Sun Apr 11, 2010 7:52 pm

However, was there ever a bullet that was manufactured that weighed 12 grams?

Wouldn't have a clue, but we're not making real guns are we :wink:

I think it is best if you describe the projectiles weight in both grains and grams or grains and ounces. Grains because people can identify with similar weighing projectiles from real guns and grams/ounces because everyone knows grams/ounces. Though I do think grams is better than ounces :P
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Unread postAuthor: boyntonstu » Sun Apr 11, 2010 7:59 pm

MrCrowley wrote:
However, was there ever a bullet that was manufactured that weighed 12 grams?

Wouldn't have a clue, but we're not making real guns are we :wink:

I think it is best if you describe the projectiles weight in both grains and grams or grains and ounces. Grains because people can identify with similar weighing projectiles from real guns and grams/ounces because everyone knows grams/ounces. Though I do think grams is better than ounces :P


"Grains because people can identify with similar weighing projectiles from real guns"

Indeed, if you are making air guns, it is nice to compare your results with the "real" world.

You would always have to convert ounces or grams to grains to do that.

BTW Weight systems can be very confusing.

How many ounces are there in a pound of gold?
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Unread postAuthor: MrCrowley » Sun Apr 11, 2010 8:13 pm

How many ounces are there in a pound of gold?

However many ounces in a pound. Personally, I don't have a clue.
This is why grams is far better. Grams in a kg? 1000.

You would always have to convert ounces or grams to grains to do that.

But far more people are having to convert grains to grams/ounces. More people are familiar with either ounces or grams than with grains, so logically it would be easier to state the weight in either of those, not grains.
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Unread postAuthor: Gun Freak » Sun Apr 11, 2010 8:29 pm

MrCrowley wrote:
How many ounces are there in a pound of gold?

However many ounces in a pound. Personally, I don't have a clue.
This is why grams is far better. Grams in a kg? 1000.


I think its either 8 or 16... pretty sure its 8. Gosh I hate imperials, why did I have to be born in the US? Metrics are soooo much easier.
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Unread postAuthor: boyntonstu » Sun Apr 11, 2010 8:30 pm

MrCrowley wrote:
How many ounces are there in a pound of gold?

However many ounces in a pound. Personally, I don't have a clue.
This is why grams is far better. Grams in a kg? 1000.

You would always have to convert ounces or grams to grains to do that.

But far more people are having to convert grains to grams/ounces. More people are familiar with either ounces or grams than with grains, so logically it would be easier to state the weight in either of those, not grains.


Hand loaders, shooters, and believe or not, arrows use grains.

http://www.carbonexpressarrows.com/cms/node/74



* Advanced technology, extreme accuracy and durability
* Straightness: ± .0015"
* Weight Tolerance: ± 1.0 grain
* Spine Selection Tolerance: ± .002"

Product Specifications
[ + ]


SPECS - Nano-Pro™
Model Grs/Inch Spine Diameter Total Weight
900 5.3 0.900" 0.177"
800 5.7 0.800" 0.180"
750 6.0 0.750" 0.183"
700 6.2 0.700" 0.184"
650 6.4 0.650" 0.186"
600 6.8 0.600" 0.190"
550 7.1 0.550" 0.193"
500 7.5 0.500" 0.196"
450 8.0 0.450" 0.200"
400 8.6 0.400" 0.205"


How many ounces in a pound of gold?
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Unread postAuthor: Gun Freak » Sun Apr 11, 2010 8:34 pm

boyntonstu wrote:How many ounces in a pound of gold?


8 ounces, or about 9 thousand Washingtons :lol:
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Unread postAuthor: boyntonstu » Sun Apr 11, 2010 8:36 pm

Gun Freak wrote:
boyntonstu wrote:How many ounces in a pound of gold?


8 ounces, or about 9 thousand Washingtons :lol:


Incorrect.
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Unread postAuthor: MrCrowley » Sun Apr 11, 2010 8:36 pm

I already told you that we are not discussing firearms and this is not a firearms forum. We are not using real projectiles as used in firearms and more people are familiar with grams or ounces than grains.

Your last post just sums up why this topic has gone to crap. You don't seem to listen and just keep stating more irrelevant points or moving on to other irrelevant points.

How many ounces in a pound of gold?

http://wiki.answers.com/Q/How_many_ounc ... nd_of_gold

Happy? That is exactly why we should be using the metric and not imperial system. Stop using grains unless you state the weight in ounces or grams too. If we start discussing firearm projectiles then we can start discussing them in grains. Until then, leave it alone.
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Unread postAuthor: Gun Freak » Sun Apr 11, 2010 8:39 pm

Ok I say this thread be locked... the end.
*And 100th Post :D
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