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· Registered
117 Posts
Discussion Starter · #1 ·
Ok, I still don't get it.

I want a couple things straitened up for my ignorant self. I was just looking at the '6.01 or 6.03' thread and saw, as usual, waaaayyyyy too many beliefs to have to compile into a conclusion(and it was locked, so here is a new thread as suggested)

Here is my 'theory': "A longer barrel with a tighter bore will be superior to any shorter one with a wider bore under ideal conditions."
-When I say ideal conditions I mean: perfect bbs, a perfect
barrel(no flaws or deviation in the diameter of the inner bore), and
a volume of air pushing the bb that is larger than that of the
barrel(so no barrel suck is acting upon the bb)

I just can't see how a shorter barrel with a wider bore could be more accurate. First off a longer barrel will give the round being fired a longer amount of time in course with a stable, controlled trajectory. Next, the tighter bore barrel will prevent the bb from bouncing around while inside the barrel. If the bb is allowed this greater 'tolerance room' it will undoubtedly bounce inside of the barrel because the hopup will cause it to hit the roof and continue to ricochet plus user error, in the form of the shooter moving slightly while the bb is in the barrel, will cause the bb to bounce around and a wider bore will let it move around more. Lastly, a longer barrel will provide the most power behind the bb with a given amount of air/gas. For spring guns there is, yes, a limit.. that being where the powering air volume is just ever so slightly larger than the volume of the barrel. But in gas guns you have an expanding gas which will continue to expand and you have an adjustable amount out gas that is released so you can virtually have as long a barrel as you can fit.

It is impossible to use perfect conditions however, as a perfect fit between bb and barrel will destroy the hopup function of an airsoft rifle. I would think that the closest you could get to a perfect fit without doing this would have to be the superior option.

If someone can explain why I am either right or wrong I would love that because this has been confusing me for so long ::)

· Registered
132 Posts
Well with any high quality barrel the bb will roll at the ceiling of the barrel. The barrel just needs to be a long enough and high quality for the bb to stabilize inside the barrel.

Since spring guns are blow guns they must push the air out while they are being propelled resulting in an inefficient fps increase and turbulence causing loss of accuracy, but a high quality barrel won't produce turbulence while the effect is happening. With 6.01 you will get more fps but the increase from 6.03 will be much smaller than the increase to 6.03 from 6.05.

With gas guns since they use principles similar to real fire arms because of the expanding air going from high pressure to low pressure that forces the bb down the barrel so the mentioned effect should be negligible with gas.

This debate is over a small Resistance force that isn't really going to affect accuracy as long as you are buying a high quality barrel. Pretty much any aftermarket barrel from MadBull up will be fine to use. You are still going to have an increase in fps and accuracy with a 6.01mm barrel. Just don't go with a barrel tighter than 6.01mm, that is excessive and will result in a lot of barrel jams and headaches.

Just be sure to use high quality bbs too.

If you have too long of a barrel there will not be enough volume of air to push the bb at a certain point the reason for this effect is different with spring and gas, but the result is the same. However it will not be detrimental to fps or accuracy, it will just result in wasted material and an excessively long barrel. The barrel would have to be extremely long for this effect to occur, probably more than 700mm.

Barrel Suck, a different effect, is widely regarded as a myth. It dosen't exist.
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