Confirm/Deny my theory about ammo

Discussion of GBB (gas blowback) replicas.

Confirm/Deny my theory about ammo

Postby Grease » Sat Sep 25, 2010 10:31 am

So I have one of the cheap Crosman C11 Co2 pistols - it's a great gas gun when playing in the field, other than the stupid downward curve of the BBs.

I'm assuming that since it fires at roughly 430fps, the .20g BBs are just not heavy enough to fly straight. Would moving up to .25g BBs improve the accuracy at all in a gun with no hopup? Or am I just clueless as to what heavier ammo does?
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Postby Nocte » Sat Sep 25, 2010 10:52 am

You're clueless. :)

You need a hop-up to put a backspin on your bb to get the bb to travel farther. Heavier bbs will have a shorter range with your current setup.
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Postby shakespeare » Sat Sep 25, 2010 1:03 pm

I used to have one of those pistols, it worked pretty nice, but it did have the accuracy of a blunderbuss.
.25s will make your shots drop FAST.
I say you try out some .12's, .20s, and .25s and see what you like best.
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Postby Grease » Sat Sep 25, 2010 1:18 pm

Nocte wrote:You're clueless. :)


Figures :)


Guess I'll be sticking with .20 then... The .12s really do make it fire like a blunderbuss, throwing weird curved shots all over the place.
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Postby Tanto » Sat Sep 25, 2010 1:46 pm

I used to have that same pistol. The hop-up will reverse sometimes. Next time it fires down, flip the pistol over and fire. It's hilarious...
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Postby Grease » Sat Sep 25, 2010 3:06 pm

Tanto wrote:I used to have that same pistol. The hop-up will reverse sometimes. Next time it fires down, flip the pistol over and fire. It's hilarious...


Heh, yeah. That is the one useful thing about it. You can almost fire around corners with it :)
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Postby Sixxgun » Sat Sep 25, 2010 8:40 pm

just save some money and buy a Gbb hell i just bought a ksc kp45 for $40 nothing wrong with it
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Postby shakespeare » Sat Sep 25, 2010 9:39 pm

He has a Crosman CO2 NBB he already owns, nothing wrong with it.
There's no reason for him to buy a new one if he is happy with his...
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Re: Confirm/Deny my theory about ammo

Postby Sixxgun » Sun Sep 26, 2010 5:04 pm

Grease wrote:other than the stupid downward curve of the BBs.



Nuff said
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Postby Catch22 » Sun Sep 26, 2010 5:26 pm

Shakespeare wrote:He has a Crosman CO2 NBB he already owns, nothing wrong with it.
There's no reason for him to buy a new one if he is happy with his...


Grease wrote: So I have one of the cheap Crosman C11 Co2...

I'm assuming that since it fires at roughly 430fps......


Yeah, there is something wrong with it. Don't ever plan on using this at any AP games.
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Postby shakespeare » Sun Sep 26, 2010 7:07 pm

I had one of the Crosmans, and I know it didn't shoot 430 with a new CO2 and .20's. Maybe with .12's.
I coulda had a seal issue, but department store airsoft guns never shoot the advertised FPS.
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Postby Catch22 » Sun Sep 26, 2010 7:32 pm

Everything I've read about these is they shoot above 400fps and even up to 480 fps. Once again, don't actually plan on using one at an AP game.
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Postby Sixxgun » Sun Sep 26, 2010 8:33 pm

That and its a Crosman I agree with catch22 he knows his shit .
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Postby SLINKEY » Sun Sep 26, 2010 9:24 pm

You should be able to take it to an event And chronograph it tho, then and only then will you truly be able to say how hard it shoots.
but, chances are its going to be hot as hell, i know Alot of co2 guns hit rediculasly hard.
dont get ur hopes down on ur "Field" pistol before you get it properly chronographed. because it could just be like spitting out of the barrel, witch is why your bb's dont go very far

As for fixing the bb drop.... Aim higher. theres not much you can do with out hop up.

And just incase you'v thought about it, maby not maby who knows.

its not a good idea, trying to sneak a heavy bb in it, to drop the fps. I'v seen People almost get into fist fights over guns shooting over the enguagement rules. thank god it was broken up and delt with before anything serious happened
you dont want it on you if you mess someones face or something up with it.. cuz ull get treated like a tard for the rest of your airsoft days. lol

thats my 2 cents if you guys care lmao..
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Postby Spey » Fri Oct 08, 2010 12:10 am

Couple thoughts ...

Might want to check the muzzle crown to make sure it has not been damaged (possibly even defective from factory). Dropped just one time is all it takes to damage a muzzles crown; air-gun, powder-gun, etc. Poor muzzle can cause deflection as projectile exits the barrel. Re-crowning might improve this situation.

If it's shooting all over, and it's actually 430fps + then heavier bb's could also help (your original question, I think), especially considering I think you said it really sprays em all over with .12's (way too light for 430fps velocities). If bb's are moving all over, also highly suggest getting some high quality bb's (there's an amazing difference in quality/roundness/consistency between crap bb's and higher grades). It's also interesting that higher grade bb's really don't cost that much more ... Example: TSD Tactical Comp Grade at $16/5,000 vs Crosman's at Wal-Mart prices of $12/5,000. Find youself a piece of flat glass and let bb's slowy roll across about 12"-18" (good bb's roll straight consistently and for consistent distance, crap bb's are like lottery tickets ...).

Suggest you check first to see if the flight direction changes as you fire from various angles 45-90 degrees in either direction from verticle. If the flight path changes (with consistency) then there's probably an improvement plan you can move twoards. If fired from 180 degrees (upsidedown) the bb's fly straighter, then you have a direction to move twoards.

If there's no hop-nub system, you may also consider attempting to re-index the barrel (rotate it 180 degrees, etc. - if possible) to attempt correcting flight induced curve that might be imparted by barrel.

Justa few thoughts related to possibly working with what ya got on hand. Many times there's huge improvements that can be made to mass produced products, if you can just figure out what's causing the issues and make an improvement plan (Crosman pellet guns, both CO2 and pnuematics are an excellent examples of this ...).

BTW, I have not shot the gun you mention specifically - so everything I write could all be crap ... take it for what it's worth, an attempt to help.

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