View Full Version : sizing rods

April 05, 2002, 16:13
Ok. How do you use them? I know it sounds silly.

FAL guy
April 05, 2002, 18:46
Originally posted by gun_collector:
<STRONG>Ok. How do you use them? I know it sounds silly.</STRONG>

They are place in the locking shoulder hole when measuring the headspace.

Here is one thread than might answer your question: http://www.falfiles.com/cgi-bin/forums/ultimatebb.cgi?ubb=get_topic&f=3&t=004944

Do a search on headspace in this forum and you'll find tons of info.

[ April 05, 2002: Message edited by: newFALguy ]

Mosin Guy
April 05, 2002, 18:47
Frist you take your extractor out of your bolt,then you put your go gage(HeadSpace gage)in the chamber,then put your sizing rod into the locking shoulder hole of your reciever then take your Bolt carrier and bolt as a unit and you try to get the bolt to close on the gage,if it will not close,you then slide your sizing rod deeper into the reciever getting larger in size as you do until you can close on the go gage but not close on the nogo gage,at the point that it closes on the go gage but not the nogo gage,you read the number marked on the sizing rod that visable in the between the reciver sides.HTH

April 05, 2002, 19:07
Damn! that sounds tooo simple. Whats the catch? :D

FAL guy
April 06, 2002, 09:22
Originally posted by gun_collector:
<STRONG>Damn! that sounds tooo simple. Whats the catch? :D</STRONG>

No catch! It is that simple. Isn't this FAL stuff great. I put off building one for years and finally took the plunge late last year. Now I realize my fears of mucking it up were unfounded. If Wile E. Coyote can do it, so can I!! WECSOG lives!!

April 06, 2002, 11:45
Originally posted by gun_collector:
<STRONG>Damn! that sounds tooo simple. Whats the catch? :D</STRONG>

Hey, come on! Not everything has to be difficult. Just slide in your gauge, check for bolt closure, pull out the gauge, and read off the step.


Source for sizing rods pictured above (http://www.falfiles.com/cgi-bin/forums/ultimatebb.cgi?ubb=get_topic&f=2&t=010090)

[ April 07, 2002: Message edited by: Wadman ]

John Culver
April 07, 2002, 17:13
And where do you get those rods?

April 07, 2002, 17:47
The rods are nice tools.

You can also use a basic pin gage. Two-dollar pin gages for sale at http://www.mscdirect.com/PDF.process?pdf=2168

April 09, 2002, 23:39
Questions on the pin gauges: 1)What range do you get? 2) What tolerance, plus or minus? and 3) What class, X or ZZ? :confused:

April 10, 2002, 08:09
I bought pin gauges from size .254 to .272, even sizes only. I have had rifles headspace out at .254" (and Imbel kit on Imbel receiver) and at .270" (R1 Kit, all matching on Hesse), as well as everywhere in between.
As a rule of thumb, I usually subtract .001 from the reading with pin guages. Experience has shown I usually end up tight if I go with the readout, usually headspace out at 1.632" or so by subtracting .001". Since I normally shoot milsurp, I feel it is a better situation than being on the tight side and perhaps having a slamfire or other unpleasantness.
There may be different philosophies on this out there, but so far with about a dozen buildups, this has worked really well.