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Giraud Tool Company, Inc.

 

 

GIRAUD POWERED CASE TRIMMER 

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holder.  Rotating the case holder from one mark to another (45º) with move the 
case holder approximately 0.009” 
 
With some of your older or scrap RESIZED cartridge cases, trim a few cases to 
check out the operation of your new trimmer.  Insert a case into the shell holder 
and press the case into the trimmer blade while the machine is running.  If the 
motor is bogged down or stops, the speed at which you inserted the case is too 
fast.  Gently but firmly will do, you don't have to jam it in there.  As you press into 
case holder, you will feel the vibration as the carbide blade removes material 
from the case mouth, when it stops, simply twist the still inserted case with your 
finger tips to even out the freshly cut surfaces.  
 
Check the case mouth on your first case.  You should see the case mouth bright 
and shiny where the brass has been trimmed.  If the case mouth is not uniformly 
trimmed around the entire diameter, it is because the runout between the cutting 
blade and case holder are just slightly out of alignment or the case neck is not 
concentric with the case body.  It only takes a thousandth or two to cause that.  
But you can easily correct or overcome this by twisting the case a half turn or 
more while the case is touching the rotating blade.  As the case rotates and 
blade rotates, the entire case mouth makes contact with the entire travel of the 
blade.  It sounds more complicated than it really is.  Just give them a twist and 
they come out pretty uniform. 

 
Next, check your overall length of the 
trimmed case with a caliper.  I will set 
the length fairly close, but it will really 
depend on how you size your brass.  
Since the case trimmer locates each 
case by the case shoulder, if your 
headspace dimensions on the resized 
brass are not consistent, then the 
case can't be trimmed to a uniform 
dimension.  I suggest the use of some 
type of headspace measuring device 
to monitor your resizing operation.  
Several different brands of tools are 
available from Stoney Point, Midway, 
Neal Jones, Sinclair, and RCBS, just 
to name a few.  The simplest device 

mounts to the jaw of your dial caliper and lets you measure the consistency of 
each case quickly and easily. 

 
Using the Trimmer 
 

Trim and measure three cases.  If your dimensions are /- 0.002" on the 
overall length, you are in the ballpark.  With a little use and consistent technique, 
your cases should come out within 0.001" of each other, every time.  If the overall 
length you measured is the length you want the finished cases to be, you are 
ready to trim some brass.  If the length is too long or too short, loosen the jam nut 

 

 

 

Figure 2 - 

A properly trimmed case has a chamfer that is 

even and smooth around the entire case mouth, both 
inside and outside.  

Содержание POWERED CASE TRIMMER

Страница 1: ...or uniform trimming and chamfering of rifle cartridges outside of a military type arsenal The trimmer comes complete and ready to use set up in one caliber Presently there are over 175 different available sizes A list is shown on the last page of this Instruction manual Additionally if you have a chamber reamer for other wildcat sizes they can be accommodated by finishing a blank case holder with ...

Страница 2: ...ids around the trimmer that could cause problems with the electric motor or switch See Fig 1 below Each trimmer is sent with a sample case attached to the sheet metal in a small ziplock style bag with the caliber noted This case was the last case trimmed with that specific trimmer before being packaged for shipment There are also two spanner wrenches enclosed in the white foam packing material on ...

Страница 3: ... case is touching the rotating blade As the case rotates and blade rotates the entire case mouth makes contact with the entire travel of the blade It sounds more complicated than it really is Just give them a twist and they come out pretty uniform Next check your overall length of the trimmed case with a caliper I will set the length fairly close but it will really depend on how you size your bras...

Страница 4: ...ngle case holder The outer body of the case holder threads into the trimmer body and is adjusted to control overall length of the trimmed case The inner sleeve of the case holder is contoured with a chambering reamer of the appropriate caliber to hold the case A light compression spring is held captive between the two parts and forces the inner sleeve away from the cutter until pressure is applied...

Страница 5: ... care to protect your eyes and exposed flesh from any flying debris Those little shards of brass can get everywhere Adjusting the Trimmer and Changing Calibers To change the trimmer from one caliber to another say 223 to 308 the case holder must be changed and the trimmer blade must be adjusted The case holder is pretty straightforward to change Loosen the jam nut on the front or top face of the u...

Страница 6: ...edge with no burr on the outside of the case mouth As a tip leaving the jam nut loose you can wiggle the case and case holder assembly a few thousandths to make fine adjustments to the blade position without knocking the blade way out when trying to make the last fine movement Once the case chamfers are set measure a few cases and determine if the case length needs final adjustment as well Remembe...

Страница 7: ...er device to trim or uniform the meplat surface of bullets The Giraud Powered Case Trimmer is among them To trim projectile meplats additional parts are needed and described below A cutting head with a carbide end mill replaces the case trimming cutter head using the interchangeable head feature Only one meplat cutting head is required to trim meplats of any caliber projectiles It is installed usi...

Страница 8: ...on brand motor have a slot at the 3 clock in the shield covering the body of the motor for a lubrication point Once in a while put a few drops of light motor oil or 3 in 1 type oil in there to lubricate the bearings on the motor and keep you trimmer working smoothly Don t flood them every time you use the trimmer but just a couple of drops every one or two thousand cases For me that s about every ...

Страница 9: ...der to your brass Contact GTC for further details if interested Problems or Questions Good luck with your trimmer and shoot all Xs If you have any problems with this trimmer or questions about operation call me or drop me an email and I will be glad to help you Together we will make your trimmer right and make sure you are using it in the most beneficial way possible My email address is doug girau...

Страница 10: ...erby 22 250 Winchester 284 Shehane 340 Weatherby 22 250 Winchester Ackley Improved 7mm 08 35 Remington 240 Tomahawk 7mm BR 358 Winchester 240 Weatherby 7mm Boo Boo 35 Whelen 243 Winchester 7mm Creedmoor 9 3x62 243 Winchester Ackley Improved 7mm LRM 375 H H 243 Winchester Super Short Magnum 7mm Raptor 375 Chey Tac 6mm AR 7mm Remington Magnum 375 Raptor 6mm BR 7mm RSAUM 375 Ruger 6mm BRX 7mm RUM 375...

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