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Accuracy again

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Accuracy again

Unread postAuthor: bravootome » Fri Dec 05, 2014 10:25 am

hello,
maybe someone dig deeper into accuracy and knows more than i do. Again i got accuracy issues, large issues.
TO 7 m i put the bb in same hole every shoot, but when i shoot to 25 m the bb hit somewhere else . I set the scope there but next shoot again someplace else. I test it all day long.....few hundred shoots........ I tried another scope, i checked the barrel to be streight few times. Changed the power. THe bb enters perfectly into the barrel from the breach loading. The barrel is inside other 2 pips so it is solid. Nothing moves. BBs are umarex steel, barrel is airsoft steel..
I dont know what is wrong cuz some time ago it was shooting very well to 40 m or far.

YOu know the satisfaction to hit where you want by one shoot.
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Attachments
1.jpg
tasco scope
2.jpg
buschnell scope
Last edited by bravootome on Sat Dec 06, 2014 10:02 am, edited 1 time in total.
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Re: Accuracy again

Unread postAuthor: mark.f » Fri Dec 05, 2014 1:59 pm

A little more info would be helpful, in particular, the valve mechanism. Shot to shot variance in power would not only produce a difference in elevation between shots, but also in windage due to the way a BB travels down a barrel which isn't perfect and through the air.
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Re: Accuracy again

Unread postAuthor: bravootome » Fri Dec 05, 2014 2:40 pm

1st picture is with a tasco scope.
1nd picture is with a buschnell scope.
Both are cheap scopes........


Edit :
1. fixed inside the scope
2. shorten and recrowning the barrel
3. removing a screw used to fix the barrel on th gun. It was strangling.
leaning the barrel after each 3 shoots.

The shoot is by 28-30 m
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30 m shoot
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Re: Accuracy again

Unread postAuthor: tater slayer » Wed Dec 10, 2014 4:10 pm

wait, you are using steel bbs in an airsoft barrel? are the bbs you're using 6mm?
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Re: Accuracy again

Unread postAuthor: wyz2285 » Wed Dec 10, 2014 5:58 pm

I strongly suggest a rifled barrel. Brass/aluminium airsoft barrel will worn out quick if you're using steel bbs.
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Re: Accuracy again

Unread postAuthor: bravootome » Thu Dec 11, 2014 1:48 am

wyz2285 wrote:I strongly suggest a rifled barrel. Brass/aluminium airsoft barrel will worn out quick if you're using steel bbs.


The barrel is made out of steel. I payed 25 euro for it. It is illegal to buy rifled barrels (they aren't for sale in my country) Or even to mount by yourself (or shorten the barrel) on a gun the you own....or to exceed the 220 m/s of the projectile...
.........they dont say anything about airsoft guns ( just to be in 6 mm caliber and not to use metal projectiles )
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