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17/32 Brass Vs 9/16 Brass: What fit for elites


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#1 Vexal

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Posted 30 July 2016 - 08:05 PM

Hello!
I am in the process of modding my Nitefinder, and I was wondering what dart fit would be better. I currently only have 17/32 brass in my hands, and it's a pretty tight fit (the only darts I can use for some reason are some zombie strike darts, as I can easily twist them in with some force).

So, I was wondering what everyone else uses for fitting elites. Also, does nested 9/16 brass over 17/32 create a perfect seal? (I wanna create a sliding breech, but if 9/16 is a better fit then I'd have to get 19/32 brass then)
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#2 CaptainSlug

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Posted 30 July 2016 - 08:43 PM

K&S 19/32" is a really sloppy fit, since its ID is .570"

K&S 9/16" is a loose fit with an ID of .5345" which is way too loose for springers unless it's part of a hybrid/telescope barrel.

K&S 17/32" has an ID of .503" and should fit stock darts (name brand or not) really well. It did the last time I used it.

 

And no, none of them make a "perfect" seal because you're interfacing brass with brass. Even when you screw brass fittings together tightly you have to dope, tape, or gasket the joint to get it to seal pressure. They wouldn't be able to slide inside of each other if they were toleranced really closely either. You're going to sacrifice a tiny fraction of your range potential in favor of having the convenient of a brass breech.

 

I've generally not been particularly happy using brass for barrels because the downsides are

  • Really difficult to glue to anything to it. Usually best to just nest it inside of something else using electrical tape instead, which also helps to mitigate the next issue...
  • Easily damaged because the walls are so thin.
  • Tarnishes, lymes, and gets ugly really quickly.
  • An extremely smooth interior surface is great for air-powered blasters, but not particularly preferable with springers.

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#3 Vexal

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Posted 30 July 2016 - 10:54 PM

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K&S 19/32" is a really sloppy fit, since its ID is .570"
K&S 9/16" is a loose fit with an ID of .5345" which is way too loose for springers unless it's part of a hybrid/telescope barrel.
K&S 17/32" has an ID of .503" and should fit stock darts (name brand or not) really well. It did the last time I used it.
 
And no, none of them make a "perfect" seal because you're interfacing brass with brass. Even when you screw brass fittings together tightly you have to dope, tape, or gasket the joint to get it to seal pressure. They wouldn't be able to slide inside of each other if they were toleranced really closely either. You're going to sacrifice a tiny fraction of your range potential in favor of having the convenient of a brass breech.
 
I've generally not been particularly happy using brass for barrels because the downsides are

  • Really difficult to glue to anything to it. Usually best to just nest it inside of something else using electrical tape instead, which also helps to mitigate the next issue...
  • Easily damaged because the walls are so thin.
  • Tarnishes, lymes, and gets ugly really quickly.
  • An extremely smooth interior surface is great for air-powered blasters, but not particularly preferable with springers.

For my BBB I currently have 12 inches of 17/32 nested in 1/2' PVC. But yeah, I can't seem to rear load stock elites into it, except for some reason, zombie strike elites (which I know are a repaint).
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#4 Cartaya

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Posted 31 July 2016 - 02:29 AM

 

K&S 19/32" is a really sloppy fit, since its ID is .570"

K&S 9/16" is a loose fit with an ID of .5345" which is way too loose for springers unless it's part of a hybrid/telescope barrel.

K&S 17/32" has an ID of .503" and should fit stock darts (name brand or not) really well. It did the last time I used it.

 

And no, none of them make a "perfect" seal because you're interfacing brass with brass. Even when you screw brass fittings together tightly you have to dope, tape, or gasket the joint to get it to seal pressure. They wouldn't be able to slide inside of each other if they were toleranced really closely either. You're going to sacrifice a tiny fraction of your range potential in favor of having the convenient of a brass breech.

 

I've generally not been particularly happy using brass for barrels because the downsides are

  • Really difficult to glue to anything to it. Usually best to just nest it inside of something else using electrical tape instead, which also helps to mitigate the next issue...
  • Easily damaged because the walls are so thin.
  • Tarnishes, lymes, and gets ugly really quickly.
  • An extremely smooth interior surface is great for air-powered blasters, but not particularly preferable with springers.

 

In my experience with brass, and I use brass for a lot of blasters.

  • Krazy glue, Gorilla glue, bonds pretty well, also sand your surfaces first.
  • Yes brass is quite thin, .014 typically, and brass is quite soft, but laminating plastic tips and telescoping 9/16th really helps. You have to be more careful with brass, if that's worth it to you, you're call.
  • Yea keeping brass pretty is more  work, But Silicone spray/pledge/Brassco, not in that order, helps a lot.
  • It's all I use for springer's, but Captain slug is right in a way, there is a payoff point for brass, and it starts at, Ide say 150 fps+ in my opinion.  You need a high velocity to overcome the drag I have found in my years of modding. Lower velocity blasters you are better off exploring other options.

 

 


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