Barrel Length Test Results (long barrel vs short barrel) - long post

[Jack & Coke]

Originally posted by battlegroup
big flaw in the numbers

line 11 has a 398fps for the 16in barrel.

this is obviosly an invalid number for this experiment and should be disregarded. (even though it may be what you actually recorded)

average the 16in cp line without the 398 and the average is 302.74. which is lower than the 12in average.

therefore it completely contradicts your results.

Sorry

It's obviously a typo when I entered it into Excel. It should be 298. Look at my actual test sheet:



It does not "completely contradict" my results.

It supports the "point of diminishing returns" theory.

A 12" barrel is not a "short" barrel. It is a "medium" barrel. It is in the middle of the most common barrels you'll see on the field today.

My conclusion of:

"short" barrels (8" - 10") are LESS efficient than "long" barrels (14"-16")

is still true and supported by my test data. If you don't believe it, please do it yourself and report your findings.

Thanks for catching the typo!

[AzrealDarkmoonZ]

Just a refinement of your hypothesis.

"short" barrels (8" - 10") are LESS efficient than "long" barrels (14"-16") in regards to step bore barrels"

Since single bore barrels were completely ignored in the study =)

I happen to have a decent collection of big bore JnJ Barrels I will test out. The only problem would be that I am not positive they are the same bore but I if I was betting I would guess they are.

Az

[personman]

Yea, well, even if this is right, Im going the ignorant route and sticking to my 10" Edge kit

[Jack & Coke]

In my initial post, point out that the reason for disregarding single bore barrels are because 16" SINGLE bore barrels are preety much non-existant on the fields and in the market place. You just don't see them and can buy them.

The most ubiquitous after market barrels that most people consider upgrading to are step-bore barrels... (i.e. CP Kit, Pipe, Boomy, Ultra-lite, JT, Freak, Sceptor, Long Bow, Equation, etc.)

[Paintchucker]

Nice field study! But I have one question:

What effect does repeated applications of Jack&Coke have on the test results???

[Jack & Coke]

Originally posted by personman
Yea, well, even if this is right, Im going the ignorant route and sticking to my 10" Edge kit

What barrel you choose is not relevant.

What reasons, theories, logic you propagate for choosing a 10" barrel are relevant.

If I choose a pink barrel because I like how it looks, then that's one thing.

If I choose a pink barrel, and tell people that it shoots farther and is more accurate and more efficient -because it's pink- then that's wrong.

The purpose of this post is to address some of the old assumptions regarding barrel performance as it relates to choosing length. Many of the old assumptions (i.e. long barrel have too much friction, less efficient, etc.) just do not apply to todays new breed of barrels.

[Jack & Coke]

Originally posted by Paintchucker
Nice field study! But I have one question:

What effect does repeated applications of Jack&Coke have on the test results???

Well, from my perspective, it looked something like this...

[cphilip]

Originally posted by Jack & Coke
It is not the point of my post to debate this.

Unavoidable on AO...

[RRfireblade]

Actually, I think your whole premise is flawed. Your perfectly willing to make the same assumtion that all current barrels of a certin length are stepped, which is what your arguement claims is flawed with single bores.Then you speak of informing newbs with accurate info.I promise you the MAJORITY by far of newbs are using factory single bore barrels and inexpensive aftermarkets.It's quite obvious to most experianced players that the EFFECTIVE length of the barrel is of primary importance in such a discussion.Your testing shows what anyone would expect.The freak tip add little or no effective length and the data suggests no real change in FPS.The CP tips however have less initial porting and even though the bore is increased, there is still a marginal increase in effective length,which should and does increase overall FPS.

Conclusion,

Shorter effective length barrels are less efficiant than a longer effective barrel until the point that the barrels length becomes excesive and losses efficiancy do to friction and mismatch of expelled gas volume versus barrel volume at given length.In my own testing down some time ago I found that to be true at around 18 inches of single bore unported length.If there's porting down the length of the control bore,I.E. just about every stock Spyder barrel,it requires less lenght.

Common knowledge to some.

Jay.

[impostal22]

ya, what's wrong with an old school single bore SP all american or teardrop? seriously..?

[Jack & Coke]

Common knowledge to some.

But unfortunately not to all.

Maybe you missed the first post, but I'll say again...

Blanket statements regarding "short" vs "long" barrels such as:

"...Efficiency, the longer the barrel the less efficient the gun is because the longer the barrel the more friction there is to over come to get the ball to 280fps... "

and

"...Length of the barrel does not affect range..."

are incorrect.

This thread provides data which de-bunk these common myths.

As far a single bores are concerned, they are not relevant with regard to comparing the best, most common aftermarket barrel upgrades you would recommend.

If someone asked, "Hey, I'm thinking of upgrading my barrel to a 16". Which barrel should I get? I currently have a 10" barrel, will there be any difference in performance?"

How would you answer him?

[Jack & Coke]

Originally posted by impostal22
ya, what's wrong with an old school single bore SP all american or teardrop? seriously..?

Not sure what thread you're reading... NO ONE ever said avything was "wrong" witha a single bore.

[personman]

Originally posted by Jack & Coke


Well, from my perspective, it looked something like this...

I WANT A REVY LIKE THAT

[battlegroup]

Originally posted by Jack & Coke

For today's aftermarket barrels:

"short" barrels (8" - 10") are LESS efficient than "long" barrels (14"-16")

This is the result you came to from your numbers. I used the numbers you have in the typed table and came up with the same numbers you did. That included the TYPO. If you actually do it with the real numbers the 16in average comes out to 302 which is less than the 304. of the 12 in tip.

By using your numbers the 12 in barrel is more efficient than the longer barrel. How does that not contradict your results?


The control bore of the CP is 5in and doesn't fall into your 8-10in range for short.

You can't compare the cp to the freak becasue they are different barrels with different characteristics.

[Jack & Coke]

Originally posted by battlegroup

By using your numbers the 12 in barrel is more efficient than the longer barrel. How does that not contradict your results?

It doesn't.

Please read the whole thread... Key phrase: "diminishing returns"

12" is a "medium" barrel.

We are not comparing "medium" barrels.

We are comparing "short" to "long" barrels.