The Cocker accuracy thing- whats the deal?

[Lohman446]

I found the equation - ok, a computer site that would do it for me. If the barrel wiggle is .1 degree your accuracy at 150 feet (1800 inches) would be varied by 3.14 inches. So my next question - does anyone have a good way to measure this barrel wiggle, is it something that exists, is 150 feet to long of range. Curious on this issue, and that ULE body in my closet is looking better and better

I deleted the link, seems how it was not functional

[rx2]

Had to delete my last post. It seems that my barrel pin isn't in, and I am not sure where it is, so my measurement of .5 mm of travel inaccurate, as the barrel is somewhat looser without this pin.

Also, I don't think I am being fair as I put more force on the barrel than what is put on it during normal firing in a game.

[rx2]

SO, with the pin in, the "wiggle," induced by hand, is roughly one quarter of a millimeter, or .038 degrees. Since that link is incorrect, I tried to calculate it myself from what remnants of trig I have left in my brain. The result I obtained was 19 millimeters at 30 meters, which I believe to be an average distance, based upon my experience.

So, if I fire at 30 meters, I should expect there to be about 19 millimeters of difference between a ball fired with the barrel at one extreme and at the other, or about 3/4 inch. Consider, though, that this is only 9.5 millimeters off from the mean.
Not bad, but still not perfect.

Again, though, I can't say that wiggling the barrel by hand will reproduce the same results that firing alone would.

Now, I remember, way back when, my old Cocker and VM-68 barrels wiggled slightly, also. They were indeed more solid, but still not perfect. I wonder what the average wiggle on one of those is.

[Lohman446]

Originally posted by rx2
SO, with the pin in, the "wiggle," induced by hand, is roughly one quarter of a millimeter, or .038 degrees.

This is what I wanted to hear and I thank you for that measurement. Please remember that I started this as a hypothetical question without having exact measurements. .038 degrees is going to bring the accuracy variable off at 150 feet about an inch - this is at the extreme "wiggle" of the barrel - by hand which you likely will not get under firing conditions as you pointed out - considering 150 as the extreme range - frankly the inch is meaningless and I will gladly concede that point. Thanks for the measurement info.

[rx2]

No problem. It took me a while to figure out what I was doing, though. I have been a bit of a scatter-brain as of late (really badly so).

I measured by clamping my marker into a vise and a measuring device under the tip of the barrel (about 14 inches). I then moved the tip back and forth as much as possible with my hand, adjusting the calipers so that they just contacted the outer wall of the muzzle. I then compared this to the normal measurement of the muzzle, and calculated the difference.

I then used the equation of TAN(theta) = Opposite/adjacent, where theta = .038 degrees, and adjacent = 30000 mm.

I think that if you are zealously pressing your barrel into a bunker, and things of that nature, the wiggle might have more of an effect than I might have though, at full range. However, I think that under normal circumstances wiggle should be even less. After all, the only things affecting the barrel are its own mass, the paint travelling through it, and the bolt. Of course, we could all be wrong, and there may be something magical in the cocker-threads.

I still wouldn't mind the switch to cocker threads, myself.

[rehme]

cockers have more moving parts so they need more elves

[spydervenom]

i made that because some kid was so sure that the cocker he just bought was better than every other gun around because its closed bolt so its more accurate.

[Albinonewt]

My buddy is convinced, absolutly convinced, that his cocker is the most accurate thing in the world (ever lasers don't shoot straighter!). However, a funny thing happened to him.

It was him (with a black magic cocker), me (e-mag), and a buddy (A-5) hanging out with a guy that wanted to buy his first paintball gun. The cocker guy made him try his cocker, assuming he would love it. He tried it out and thought it was pretty cool, and liked it. He asked to see my gun, and I asked him how much he wanted to spend. Then he asked to see the A-5. He preferred the A-5's accuracy and range over the cocker!

My buddy nearly cried himself to sleep that night. The rest of us had a good chuckle at his expense.

I remain firmly commited to my policy of loud volumes of paint over the pat pat pat of single shot accuracy!