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Hello everyone,

I've just purchased a 1kg pack of SRC 0.25g bbs, and for some reason, I'm facing feeding issues with my Cyma CM030 AEP. Every time there are only three rounds left in the magazine, the gun shoots two bbs at once, leaving one round in the mag. It can also occur earlier (less frequently), but it happens every time there are three bbs left.

Usually, this feeding issue has to do the bucking, but  it doesn't seem to be a problem with the gun, nor with lubrication, as I wasn't facing the same issue when I used my other pack of 0.20g bbs, and it seems that those 0.25g bbs can be inserted by applying less force on the speedloader or when manually inserting bbs, they seem go inside the magazine more easily, in other words.

My hypothesis is that the bbs are not being held properly inside the mag, is it because those SRC bbs are "5.95mm -0.01mm" instead of 6mm? As far as I know, bbs are supposed to be 6mm in diameter. Does this mean anything? Did I purchase the "wrong" bbs? SRC is known as a good brand for bbs, and they don't seem to be faulty.

Thanks in advance! 

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No BB yu can buy outside of Japan is 6mm.  It's between 5.95mm and 5.97mm.

Most likely your issue is your using small bore bbs and it's High Polish.

High Polish...bad...small bore...tricky to use.
 

Post a picture of the finish of the bb to confirm its High Polish.

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Thanks for the fast response!

I've charged my gun's battery and the issue seems to be less common now, even though it still happens. Does it also have to do with the gun's low energy (0.37J) and velocity (only ~180fps with 0.25g)?

Here are the pictures of the bbs finish and the pack. 

But isn't high polish supposed to be of the best quality available? And what is this small bore type, how can I know if I'm buying this kind of bbs or not? I've never seen any information on packs detailing whether it is small bore or not. And why is it tricky to use, does it work only with certain guns?

imageedit_4_2682001002.jpg

imageedit_2_2103459921.jpg

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First off let me preface, this is real life and this is Airsoft.  There are no standards, there are no levels of mandatory QC.  American Consumerism does not apply.  No truth in advertising is required and upgrade parts are just stock parts rebranded/rebagged and sold for 20 times it's cost as a stock component.  Which means yes...upgrades are not upgrades.  Rather in most cases it is a lateral and a downgrade in some cases.

Do you expect those in the USA Airsoft to be knowledgeable and competent people that only has your best interest in mind in bringing the best value to you as an Airsoft consumer?

Why, no!  How do I know this?  I have been in the Asian Airsoft industry since the 20th Century, I have worked for Western Airsoft companies that were absolutely clueless on the concepts of physics (this is important here) and chemistry.  There are many pieces of evidence that the USA Airsoft industry is how you would say...inexperienced (politically incorrect, stupid) on the matter of Airsoft and Science.  In turn they propagate myths and errors on what you the Airsoft Consumer should use.

Rather they would want to bank on your "inexperience" (and I have a story about a "VP of Marketing" comments about new players) to make you part with your hard earned money.

So, with that...why would you think high polish is good?  In your picture it shows it is indeed high polish.  There is quite a gleam!

A brief scientific fact:


Round objects do not fly well when it's perfectly smooth.  In fact you need a "rough" surface to reduce drag.  This is why Golf Balls are not perfectly smooth and have dimples.  This causes air around it to be turbulent and that helps reduce drag in flight.

One of the best bbs in Japan is Maruzen SGM's
Notice they are "not" high polish.img57039767.jpg


As for small bore that is what we call a defect bb that was over polished to remove the defects (shape) and that results in a smaller diameter bb.  Small bore is anything that is 5.94mm or less.  Normal bbs should be around 5.97mm +/- .015mm

So with small bore and high polish..it causes bbs to "squirt" in a feed channel.  If you have an AEP/AEG that is running slowly (like on a weak battery)...and a  feed nozzle in this case.  Instead of a quick pop to seat the next bb...the slow drag cause one bb to load and as it retracts another small bore bb can slip up and by the nozzle and is pre-staged in front of it.

Edited by Guges Mk3

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I'm a beginner in airsoft, and I was indeed very, very misinformed. Thanks for the clarification, my friend. At last, someone 100% honest in this planet!

I didn't have a clue about such negligence in the industry. I'm shocked, really.

Tutorials told me the contrary, that the "ideal" bb is a perfectly round one, that imperfections may cause damage to your gun, may break inside, are innacurate, etc. But the people who wrote those tutorials were very mistaken, and no one bothered correct them for some reason. If it wasn't for your explanation, I would be in the dark for god knows how long... 

I'm not naive to think that sellers are as honest as you were with me, but at least the level polish is supposed to be indicated somewhere, it is vital information, it's like selling bbs without mentioning the grammage. And actually I live in Brazil, things are even worse here, the spread of misinformation is greater than in the US. Costumers get the worst quality products, high-end airsoft equipment is starringly expensive here, and usually requires importation with a huge amount of bureaucracy, as airsoft is a heavily controled product by the army and the brazilian federal revenue.

But complaining doesn't solve the situation, I don't want this to happen ever again, every time my gun shoots two bbs I'm wasting the money I've spent in this pack. Next time I'm shopping for bbs, Is there any way I can find out if they are high polish or not? I've purchased this pack online, do I need to inspect the bbs in person to be sure, or is there a method?

It's a shame that I can't ask for a refund, as the pack has been opened and bbs were used, so I'm stuck with them.  But is there anything I can do to fix the double feeding issue? I was thinking of doing something to make the magazine hold the bbs a little more tightly, maybe put some tape on top where the bbs are held inside, just a little. Could it work? 

Sorry for the sheer ignorance, it's just very frustrating, and I want to know how exactly how I should handle this situation.

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On I know about sending items to Brazil.  I sold KSC Perfects (Medium Polish) to some players in Brazil back 12 years ago.  I could put two in a Flat Rate Mailer and it would get in quickly.  They brought them 2 bags at a time for Brazilian Customs didn't care about a couple of bags and let them get through your Protectionist Policies and Tariff a lot easier than a case to a store. 

As to what to get, start at the description...if it says high polish...don't buy it.  

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It doesn't seem to be that easy any longer... 12 years ago, Brazil was another country, not to mention that airsoft wasn't even regulated, the first official legislation came in 2010, and there have been some updates in 2017 as well. To import items by yourself, you need special certification, not to mention that taxation is almost inevitable, the Brazilian Customs are much more rigorous nowadays due to the financial crisis, they inspect everything they can. I wouldn't risk it, I don't want to be fined. And with the US dollar so expensive, it is not viable to import, at least while this pandemic lasts.

About your reply on what to get... If the level of polishing was clearly displayed in the description, why would I have sent you pictures to confirm it is high polish? I would have simply told you, right? So it wasn't there. All I thought I knew was that I was purchasing good quality bbs due to the brand's reputation here.

And that's the problem, most sellers here don't mention whether it is medium or high polish. They just mention brand, grammage and quantity, and whether it is tracer or not. Some times they mention "high precision" or "less drag", but not always, and that doesn't necessarily mean it is high polish. So, as you can see, it's kinda hard for me to figure it out. I'll keep an eye on that, but it's not that easy, unfortunately.

You mentioned a Japanese brand before, Maruzen SGM, the Japanese bbs are the best, right? Is Tokyo Marui any good for your standards? It's the only Japanese brand I can easily find here, but it's very expensive, a pack of only 1300 0.25g bbs costs the same as the 4000 bbs SRC pack I purchased. There has to be a difference to justify such price difference, as SRC is already a good brand. Should I go for Tokyo Marui next time I'm purchasing bbs?

And you skipped my question on what to do with the bbs I have here, how to at least minimize this issue with my AEP. Is there anything I can do? Any help is appreciated.

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Brand Reputation is based on "local" experience.  In the USA the EF1911 has a good reputation among certain levels of Airsoft Players, but the product is still a PILE of junk that runs on CO2.  In this case, the reputation is among the perception of the user and not the product itself.  This shows two things.  Users are "inexperienced" and it's all about marketing.  Marketing taking advantage of that inexperience, mainly the knowledge on Physics and how things work.

Because Airsoft is not made to a Standard, my very first warning:

"First off let me preface, this is real life and this is Airsoft.  There are no standards, there are no levels of mandatory QC.  American Consumerism does not apply.  No truth in advertising is required and upgrade parts are just stock parts rebranded/rebagged and sold for 20 times it's cost as a stock component.  Which means yes...upgrades are not upgrades.  Rather in most cases it is a lateral and a downgrade in some cases."

One companies High Polish is not the same as another companies high polish.

And your marketing issue is not unique.  Same is happening in the USA.  The sellers are using the marketing they get from the factory.  Unless they are truly experienced...you will have to become a Subject Matter Expert yourself.

All Japanese Airsoft are actually made to a Standard.  ASGK.  TM and Maruzen bbs are very good...and not High Polish.  Japanese products in Airsoft will always be at a higher price.  It's your choice if you need that extra level of performance.  If you are playing room to room when shots are under 25M...sure...run SRC.  If you are playing outside and you need to may 75M shots consistently...I would go with a better bb.

You can't do anything with your existing bbs.  If you have a Rock polisher...you can throw the bbs into the polisher with the 1000 grit media and to take the shine off them so they fly better.  However, that is a lot of work...

Edited by Guges Mk3

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I see... 

Well, then I'll go for Japanese airsoft products when budget allows, at least I can expect something from them. As you've mentioned, there's is a standard. 

I don't have a rock polisher here so, yeah, I'm stuck with these bbs. At least most shots don't double feed and it gets less common when the battery level is high. 

Thanks for the help and valuable information dude. 

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