Bolt action BB loader - Issues

Building or modifying BB, Airsoft, and Pellet type of guns. Show off your custom designs, find tips and other discussion. Target practice only!
Doodmens
Private 3
Private 3
Posts: 53
Joined: Tue May 19, 2015 7:44 am

Sun Sep 04, 2016 11:32 am

Hello,

It's been a while since I finished a rifle, but right now I'm very close. (that's the mechanical part, haven't started on the stock yet, boring..)


Here are a few pictures:
Image
Image
Image

And now the part I'm having trouble with:

Image

A tubes slides in the barrel, blocking the hole which you see in the picture. When slid back, a BB can enter through the hole and my plan was to have a tube with BB's under spring pressure connected to the hole, so that to reload, you'd only have to pull back the tube and push it forward again, moving the BB into the barrel. Note: I use steel BB's

The problems;

1. When done as described, upon pulling back the tube all the BB's enter the barrel because either the spring pressure is too high or too low.
My solution: Have a much longer spring so that the pressure remains more constant. Con: It would take up a lot more space and I can't bend the brass tube very well ( to fold it alongside the barrel for example ) without it deforming.
I also tried to knock a dent in the barrel so that the first BB would stay in place, but this didn't work.

2. Should one BB successfully enter the barrel, it can still roll out. I've tried using magnets, but since the barrel is also steel, the magnetic field gets too dispersed/weakened for it to hold the BB in place.
My solution: I can't say that I have a good one.


I can think of a few more complex solutions that would work for the reloading, but I thought maybe one of you has a better (simpler) fix for this issue?
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26179
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 543 times
Been thanked: 319 times

Donating Members

Sun Sep 04, 2016 12:11 pm

Looking good!

sounds like you need a detent. Some options include an o-ring sandwiched in a threaded fitting:

Image

Also hole drilled in the barrel with a slightly larger metal ball retained by a flexible mechanism:

Image

You can also buy read-made spring loaded detents that can screw into your breech:

Image
hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1077
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 93 times

Sun Sep 04, 2016 3:15 pm

can you magnetize the barrel ?
Doodmens
Private 3
Private 3
Posts: 53
Joined: Tue May 19, 2015 7:44 am

Wed Sep 07, 2016 9:21 am

Tried that, without much success
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1077
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 93 times

Sat Dec 31, 2016 5:47 pm

any updates ?
Doodmens
Private 3
Private 3
Posts: 53
Joined: Tue May 19, 2015 7:44 am

Tue Jan 03, 2017 6:31 am

Been busy with school and such, but the stock is almost done, just need to sand ( a lot ) and apply finish. For the gun itsself, there are a few features I want to add, like a way to secure it to the stock other than friction, and a trigger safety ( as it's very sensitive right now ). I'll try to upload a picture later today
Post Reply