Author Topic: Urban bonehead  (Read 340 times)

d_boom

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Urban bonehead
« on: December 06, 2018, 01:42:23 PM »
Each week I get together with other old guys and shoot airguns.  When I got my Urban of course
I had to shoot it with the guys.  We took turns shooting the urban, but when it was my turn I
somehow loaded two pellet into the chamber at the same time.  Tom Gayloard had problems
with pellets clipping on the moderator's baffles when he reviewed Gamo's Urban.  Well, I had
more than just pellet clipping when I fired, plastic was shot out all over the basement floor in
front of All! 

It was Ok as I really thought the plastic moderator was too UGLY, and I now had an excuse to
make modifications.    I have posted the modification I made on this Urban on - PCP,Co2, and
Helium Powered Airguns, titled "Urban Modifications".

I have learned - when you fail to pull the bolt back far enough to cock the action. pull the bolt
back remove the magazine then close the bolt and shoot.  You can have a pellet just part way
out of the magazine and then you can't pull out the magazine out, just cock & close the bolt
and shoot you don't have two pellets loaded.


  • Wichita, Kansas

Alan

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Re: Urban bonehead
« Reply #1 on: December 06, 2018, 03:34:57 PM »
Ah! A shotgun effect! I have been there once to often myself!

  • Roswell, New Mexico
Alan

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Gerard

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Re: Urban bonehead
« Reply #2 on: December 06, 2018, 10:01:05 PM »
I used to let two pellets fly the odd time when training for 10 metre air pistol. I'd de-cock the Pardini K10 making it safe and set it down, then picking it up again would load a pellet, having forgotten I'd left one in the chamber. The K10 has a half-round tray and pellet probe, so not easy to see in there whether a pellet is loaded. When I shot, the two would strike the paper about 4cm low and slightly to the left of centre, always about 1cm apart on the diagonal. Very reliable. And of course I'd feel like an idiot. Never happened in a competition, fortunately. And now I have a K12 with a very visible pellet skirt at the entrance of the cone-shaped rear end of the barrel, so no risk of double-loading as there's no probe to push pellets in deeper. Interesting how forgetful one can be though... I must have done that five or six times over a couple of years.
  • Vancouver, Canada

d_boom

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Re: Urban bonehead
« Reply #3 on: December 09, 2018, 06:40:19 PM »
After removal of the plastic moderator with it's baffles shot out a 1.0" x 19" thin wall Alum. tube was installed.
Tube covering the barrel which has an air-stripper installed also has baffles inside.  First baffle redirects stripped air
back down the tube which vents air out by the action.  The attached pictures show how the Urban looks now.  An
improvement in appearance? 
  • Wichita, Kansas

Termite I

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Re: Urban bonehead
« Reply #4 on: January 11, 2019, 08:50:09 AM »
Your shroud looks great!  Did the sound level change?
  • Lafayette, Colorado

d_boom

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Re: Urban bonehead
« Reply #5 on: January 12, 2019, 06:48:27 AM »
Sorry, I don't remember how loud/muffled the Urban was before I made my modifications.  My hand on the
forearm feels air exiting from the back of the shroud with each shot.  Sound is reduced, I could say backyard
friendly what ever that actually means.  Certainly not my backyard which faces a busy four lane street and
has a wrought iron fence allowing all the joggers and dog walkers a full view of my backyard!  I do like the
appearance of my modifications over the ugly plastic moderator which came on the Urban. 
  • Wichita, Kansas

Termite I

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Re: Urban bonehead
« Reply #6 on: January 12, 2019, 02:28:48 PM »
I'm thinking of putting a carbon fiber shroud on mine.  I see from your pictures that you put four vent holes on the bottom.  Is that all the vent holes or did you put more somewhere else?
  • Lafayette, Colorado

d_boom

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Re: Urban bonehead
« Reply #7 on: January 14, 2019, 05:13:20 PM »
Four vent holes is what I used.  They are too large and too many in my opinion. My vent holes are
3/16" too large, use a smaller size and start with one or two, more can be added later or enlarged.
A carbon fiber barrel shroud is a great idea.  I have though about making one myself to replace
the aluminum tubing I used.  A support is attached inside the shroud which is a tight slip fit over
the barrel a couple of inches behind the air stripper.  This support is drilled and filed out to allow
air to freely flow past to the vents at far end of the shroud.
  • Wichita, Kansas