Giraud Tri Way Trimmer

[renodraws]

I just got my Giraud Tri Way Trimmer and tried it out. This thing is great. Everything else I was finding like the WFT, you had to take the second step and chamfer in a separate process. This seems like their $400 trimmer that you mount to a drill.

It is $90 for a single caliber, but if you do a large volume of any of the cases they offer it is well worth it. I think it was taking about 12 seconds a case when I was just starting out.
I was getting .002+/- on the length, which I think I can get better with practice, they were mostly longer.

Tips: don't jamb the case in, smooth. Have the trimmer running when the case goes in. Use a pair of light work gloves because the case can try to twist in your fingers.

 

[IPSCNUT]

On a trimmer such as this, which indexes off the case shoulder, as opposed to the case rim, how do you maintain good trim length when the shoulder index point may vary even after sizing? Some of my cases even after firing/sizing will be short at the shoulder and are not bumped by the sizing die. I am very interested in one of these trimmers but I do not see how this issue can be corrected.

Any comments would be appreciated!!!!!

 

[Alex Wheeler]

If you want the same neck length in the chamber you want to index from the shoulder when you trim as the cartridge indexes off the shoulder in the chamber when its fired. But if your shoulder bump is varying more than +/- .0005" than you should fix that.

 

[searcher]

The trimmers that work off the shoulder are great for high-speed trim work. Coming up with the uniformity of say, a Sinclair or other trimmer measuring off the back of the casehead will be more problematic. Not that it can't be done - just more problematic and a bit more tedious. As you know, getting all shoulders to bump and stay at the same headspace requires the same brass thickness, same level of annealing, same pressure on the down stroke, etc., etc. Depending upon your brass, IMO experience, you may get around .001" or .002" deviation

 

[SFGUY]

Yep, you want to trim off the shoulder to neck dimension. the cases stretch upward towards the neck. Your chamber has finite dimensions, ie, headspace and length from shoulder mid-line to the tip of the neck. as the case is inserted into the chamber, the shoulder will bottom out with the case neck just off the step when trimmed correctly.
You can still measure your case length with a caliper if you want.

A bump gauge will measure from the mid-line to the case head. Essentially that confirms the headspace and has nothing to do with the mid-line to case neck end. If you are doing both trimming and checking once in a while with a bump gauge you are getting it right.

Good shooting

 

[BigGunBarry]

I found my Trim-It II, which also does the chamfer and deburring...similar to the Tri Way...the benefit is that the body can detach from the unit...I bored the through hole a little wider in my insert, so that fire formed brass will fit...after doing that I dropped my pre-fired brass into the unit and turned it upside down, then measured it with my calipers..then I measured my fire-formed brass the same way, and saw a variance of .010" - that way I knew how much my shoulder moved..so I sized my brass accordingly...The other benefit I found is that I can swap out the inserts..meaning I also don't have to buy a whole nother unit to go between calibers.

 

[madderg]

Forester has had one for several years, and it is slick!!

 

[BaconFat]

... Trim-It II, ...The other benefit I found is that I can swap out the inserts..meaning I also don't have to buy a whole nother unit to go between calibers.

Little Crow Gunworks recently came out with their WFT 2 which is like that. I wonder why Dale didn't come up this model in the first place.

 

[rebs]

Does the WFT chamfer and deburr ?

 

[Fullbore308]

it cuts to length, the tri way Giraud will do all 3 at once. slick, takes the pain out of trimming especially if the old knuckles are little stiff, rather save my trigger finger for something other than brass