Tight Bore Truth

Okay so I was skimming ASF and ran across a thread and one of the members was saying a 6.03mm to 6.05mm was better for people shooting over 150ft, and 6.01mm was better for anything under 150ft I am not sure I have never heard that myself.

I kind of think it is true in ways because if the BB's bouncing less it can come out at a higher distance if the hop up is up. But like I said I am not sure maybe he doesn't know diddly squat about it.

From what he was saying though he has 6.01mm TBB's in most of his replicas and was 6/10 people at 200ft, but the 6.03 was hitting 8/10 at 200ft. There was nobody else that could vouch for him though or that posted vouching for him so I want to bring it here where it's in more of a calm environment and I won't get shot outta the water.

Please only post if you know for a fact though I don't want assumptions going through here and confusing me and other members.

If somebody has both a .01 and .03 could you maybe test it out for us all barrel switching isn't hard but it would be up to you.

I have shot a 6.03 and a 6.01, only difference in the barrels other than that was that the length of the 6.01 was 550mm and the 6.03 was 363mm. But I can assure you, I found a much better grouping with the 6.01 at 185 than my 6.03, the 6.03 would miss the target I was shooting at around 5/10 times. While the 6.01 was hitting 8-9 out of 10 pending on wind. With the 6.01, I knew I could hit the target with a single shot, 6.03, I would want to put it on full auto to make sure. It is a big difference.

The tighter it is, the more accurate it is. That is from my, and MAN- MANY friends/teammate's experiences.

6.01 all the way
gotta have it for DMR's, or field guns in my opinion.
6.03 is best for CQB guns

I can see one huge problem with the test this guy did. SAMPLE SIZE! Out of 10 shots, you're going to be testing shooter error rather than barrel accuracy. I can't be sure of how well this guy set up his test, but another thing to take into account is CONSTANTS. Ideally, for this test, it would be done in an indoor shooting range with the same gun and the same type of hopup and bucking, if not the same hopup and bucking. Were I to do this test (which I may eventually do just to clear things up) I would do 100 shots with each barrel. The difference between 6/10 and 8/10 is negligible to the point of being useless. If it turned out to be 60/100 and 80/100, that would be far more convincing.

Another thing to take into account is arcing. Is this guy really making point-of-aim = point-of-impact shots at 150 feet? Or is he lobbing them at his target? If he's lobbing them, then his BBs will be guided more by air currents than they would if he made straight shots.

Always stay focused on the scientific process if you want to make a test like this valid.

@Omega Lambda Also consider getting a rifle stand for this test. If you can eliminate the actual need to re-aim the rifle in question, that should give getter results, as each shot in theory should be the exact same.

~AFU

Big 5 has rifle clamps for like $30

Thanks, I'll be sure and pick up something to steady my replica if I do end up doing this test.

If you believe in the theory of bb bounce(which I do), then STBB such as 6.00, 6.01 and 6.02 barrels are really only useful in smaller barreled rifles. This is due to the fact that the bb bounce is reduced marginally by the tighter spaces. In rifles greater than an M4 length 6.01 barrels actually hurt the accuracy more than they help; compared to after market large bore barrels at least. This is due to the greater friction known as barrel scrub, which basically means the BB is "rubbing" the barrel to much, so it just reduced the affect of the hop-up. PDI actually markets its 6.08 barrel as the most accurate in the series! TM could have made all of their guns come with 6.01 barrels, but they chose a 6.08... I wonder why...

Here is a whole article on the effects of barrel scrub and long length STBB's.(ehh can't find it, i'll keep looking though).

Found it: http://forums.airsoftmechanics.com/index.php?topic=842.0 Shows theres a heck of allot more to better accuracy than just a TBB. There should be some good tips in there for you guys(teflon, barrel polish etc).

sticks

Okay so I have been PMing snipers all over ASF I know I know but there aren't many here that have fully upgraded rifles. And many of them are saying they have 6.03mm in there replicas because it seems to do a lot better then the 6.01mm.

And what sicks posted is pretty much what all them are saying, 6.03mm and up seem to be better for longer rifles.

Keep in mind that you guys can GREATLY increase your accuracy by reducing the vibrations in the barrel. If you have a BAR or similar sniper rifle you can fill the space between the inner and outer barrel with cotton balls or something similar. This will do more than you can imagine. Another thing to look into is polishing your barrel, I made a guide awhile back. I still do this with all my rifles and all my barrels.... It doesn't matter if its a 6.03 or a stock 6.08....

sticks

sticks.13 wrote:

Keep in mind that you guys can GREATLY increase your accuracy by reducing the vibrations in the barrel. If you have a BAR or similar sniper rifle you can fill the space between the inner and outer barrel with cotton balls or something similar.

sticks

I just aquired a BAR 10 in a trade....how would I do this??

Barrel polishing guide: http://www.airsoftallies.com/share-your-knowledge-advice-and-faq-f40/barrel-improvements-t1261.htm

For the vibrations, you literally just stuff cotton balls into the outer barrel evenly....

sticks

BTW M14 the bar has a 6.04mm barrel stock, if that helps anybody.