THIS IS HUGE, comparing 6.01mm tightbore to a 6.08mm stock barrel/Polishing your barrel for more accuracy.

Ok so I have been looking at all of this talk that now PDI is saying that now the 6.08mm tightbore is more accurate then the 6.01mm tightbore.


This is the image that has been published by PDI saying that the 6.01 tightbore is actually less accurate then the 6.08 barrel. Seems a little different because I know that people have always told me that the tighter the bore than the more accurate your gun will be. Well I have been reading these articles and decided to try this out for myself. Also with this testing I decided to also test the polishing idea, that if you polish the inside of the barrel with regular liquid car polish then it will fill in the small holes and cracks in the barrel and make the air flow better, giving the gun more accuracy.

All tests were done with a TM VSR-10 G-Spec with a PRO sniper 430mm barrel kit on it, the hop-up rubber was a Firefly Hard Type, and the spring was a Laylax 190m/s spring. The bb's used were Super Grand Master .29g BB's. All of the groupings are done with five shots.




Below is a picture of what groupings I got when I had installed my old stock barrel into my rifle, which the inner barrel diameter is 6.08mm, the groupings are pretty usual for a 30 foot shot with a stock barrel. This is with the barrel freshly cleaned and oiled, but not polished.



This next picture is one of my Dees Customs 6.01mm tightbore barrel, 430mm long, and no polish, just freshly cleaned and oiled. Not very surprising that the tightbore would do better then the stock barrel, right??



Before I show you the pictures of the groupings after being polished here is the polish that I used.



Ok well here is the picture of the STOCK barrel after being polished again at the same 30 foot distance.



Quite amazing considering that here is the TIGHTBORE after being polished.



So now that the fact that polishing the barrel does in fact greatly improve the acuracy of stock barrels, and that it amazingly made it more accurate at a closer distance then the 6.01mm tighbore was. I decided that it was time for some long range shots. I decided to take the target out to 100 feet and see if the tightbore would prevail over the stock barrel.

To my amazement this is what the groupings looked like, at 100 feet and using the STOCK barrel this is what I got.



Now I looked at these results and was just amazed at how could this be possible, so then I decided to go on ahead and test the 6.01mm all mighty tightbore and this is what I got.



So this information is enough to prove to me that tightbore barrels do nothing but add friction onto the bb and make it spin off at a distance, polishing the barrel really does marvels, these results have changed how I buy airsoft barrels.

That is awesome,great job.

Thanks dude, I have the actual pictures at my house if you ever care to look at them.

how exactly did you polish it?

How about the distance the bb will travel? Is it any less? FPS loss compared?

What was you shooting position? Prone, kneeling etc. Was your gun clamped down, on a bi-pod etc.?

XXX wrote:http://www.airsoftretreat.com/forums/index.php?topic=78009.25

Why did you post the link to my other post on AirsoftRetreat??

But my gun was sandbagged down, so it had no movement. I do not have a chrono to tell FPS, but I am not concerned with FPS because I am a sniper, I am just looking for more accuracy, and so my tightbore is going on vacation, if anyone wants to buy it be my guest.

But to polish it you take some polish and put it on the end of the fuzzy catepiller in the .22 cleaning kit, then attatch the other end of the cleaning to a drill and spin the cleaner through the barrel, then take cleaning rags and run them through with the cleaning rod till they come out clean.

Stickied* Great research/testing.

I'm still trying to wrap my head around the debate about tight bore barrels so please bare with me. I can't rule out tight bore barrels yet.

According to the PDI diagram at the top of the post, the 6.01 gives a greater FPS result BUT the 6.08's air cushion "carries" the bb longer. Knowing for a fact that a heavier bb is going to travel straighter, and hold it's energy longer than a lighter bb with the same FPS, I cant rule out the FPS side of the argument. There must be some "magical" balance between, FPS, bb weight, bore diameter, and barrel length.

Just with the "carry" and "FPS" as factors, the logical conclusion would be a 6.03-6.05 barrel as being the best bet for most situations. The FPS of the gun, and the weight of the bb's would need to impact the decision.

It's also evident by your testing that a polished barrel makes a significant difference. I know this is a no-brainer but should be mentioned, as someone else already mentioned, that the proper polishing agent should be used so as not to damage the inside of the barrel. For instance brass polish for brass, metal for metal, etc.

You scrubbed steel on brass?

Is 5 shots a piece really enough to be making a conclusion about this? How were wind conditions? It seems like there are too many possible variables to be making any solid conclusions yet, although the results seem pretty evident at first glance. Great work, but perhaps we should get some more testing before we really decide. By the way, on the airsoftretreat forum, somebody said that TCF and EDGI had already disproved this. Does anybody have a link or something to this? I don't even know where to begin looking for that information.

I agree with matt,

Also if you are getting 10 inch groupings @ 100 feet you are doing something very wrong, TCF is getting nickel sized groupings @ 100 feet off an 6.01 EdGi barrel on his "Jerambis" build.

All i can say about this, is that when I switched over to a 6.01(Thanks again TINMAN) on my g36c i noticed a HUGE difference in the accuracy. I also gained between 5 and 10 fps.

In order to find a true answer on this question you would need to put together several different types of barrels in several different types of guns. Also the test should be done in full auto at least once. Key to finding scientific answers is the ability to repeat the experiment with the exact same results and to eliminate variables that could be effecting the outcome. For example: does this hold true for all barrel lengths? I could see how a 363mm 6.01 would be vastly more accurate than a 247mm 6.01mm and I could see a severe reduction in power going from a 247mm 6.08mm to a 363mm 6.08mm.

More important than the facts is the source. Does the company trying to push this theory sale a 6.08 "tight bore". It is in airsoft as it is for all of life, "follow the facts to find who is getting paid to produce them and then decide if you want to belive"

I will try it I have my old stock barrel, I will polish it and post the results.

Edit:Never mind I don't feel like switching buckings. If anyone want to donate a bucking I would be glad to do it.

Another version http://airsoftsniper.proboards107.com/index.cgi?board=gear&action=display&thread=844

reconsniperga wrote:Another version http://airsoftsniper.proboards107.com/index.cgi?board=gear&action=display&thread=844

Good link. It really says it all along with what others have already posted. A proper test would be inside at 50, 100, 150, and 200 feet. Same gun with barrels from stock to 6.01. Doing the test with different weight bb's would be good too. Independent testing is always the best. PDI is in business to sell all of their different barrels. Having the access to a range and the money for all the above is tough.

For the record I have two 6.01's, two 6.03's, and one 6.04 in some of my gun's and all have improved the accuracy from stock. I have not tested, for example, a 6.01 and a 6.03 in the same gun yet.

"How many licks does it take to get to the center of a Tootsie Roll Tootsie Pop? The world may never know."

reconsniperga wrote:Another version http://airsoftsniper.proboards107.com/index.cgi?board=gear&action=display&thread=844

Yeah I based my tests off this origional testing, but I went to the far extremes of the 6.08 and the 6.01.

I think probably the best way to continue the testing is to increase the distance. Because honestly, who cares about half an inch of spread at 30 ft? It doesn't make a difference. But at longer ranges, when the other factors such as carry and such come into play, the accuracy of a tightbore may be better even if it's a little worse at long ranges. Basically what I'm saying is that at 30 ft, all you're testing is the immediate accuracy of the BB exiting the barrel. Factors that affect the BB's flight over the long term aren't taken into account, and I think that a tight bore barrel may beat out the stock barrel in the long run (no pun intended). Then again I may be completely wrong... Just a thought

Oh yea, my buddy sticks did this not too long ago also. I am supposed to get him some numerical feedback as soon as I get my gun fixed.

I'll have a whole Excel display of piegraphs and comparisons. Not to mention chornograph data.

Lone Wolf wrote:Oh yea, my buddy sticks did this not too long ago also. I am supposed to get him some numerical feedback as soon as I get my gun fixed.

I'll have a whole Excel display of piegraphs and comparisons. Not to mention chornograph data.

Alright cant wait for the data to come out.

I would like to see what Rhino thinks about this...

I would too, but I am actually gonna get the EdGI 6.00mm ported tightbore and test it out before i close out on tightbores.

Little late on finding this here.

Anyways; This is the same concept that tippmann phnuematics used on their stock barrels. It failed, epically. I will try this one myself with a barrel I have sitting around, but I fear this may be bollocks.

The theory that the air will keep the BB in the middle of the barrel is absurd. When I tested the tippmann barrel, I put paint on the outside of the paintball and looked inside the barrel when I was done. There was paint where the ball had bounced from side to side.

I will try the same technique in this, and I guess I will have to split the barrel open with my dremel to see where it had bounced.

UBCS Gibbs wrote:Little late on finding this here.

Anyways; This is the same concept that tippmann phnuematics used on their stock barrels. It failed, epically. I will try this one myself with a barrel I have sitting around, but I fear this may be bollocks.

The theory that the air will keep the BB in the middle of the barrel is absurd. When I tested the tippmann barrel, I put paint on the outside of the paintball and looked inside the barrel when I was done. There was paint where the ball had bounced from side to side.

I will try the same technique in this, and I guess I will have to split the barrel open with my dremel to see where it had bounced.

Go for it and post the results.