Has anyone tried the GSI trimmer tool head with the
Built in vacuum port.
I was thinking about making a tool head I could use
A decapping die and a sizing die after the trimmer.
Looks like this would be a lot less work on the milling
Machine.

Was wondering how well the vacuum port works.

Thanks in advance for the replies.

Jsjac

I have ordered one of these to try. When I get it and have a chance to try it I will do a quick review of it

Jsjac

Yep, I have one, it works. I don’t size after trimming though. Cases, if they are going to “grow” do so when sized, pointless to trim then change dimensions.

I have set up the new tool head. I like the built-in vacuum port.
I size after the trim die because the neck diameter is too small.
I will aneal the brass before I load the newly made 300 Blackout brass.

If it’s too small what does sizing it do?

Are you just running an expander through after trimming?

If your making brass from 223 the expander after will be your only hope as thickness will be all over the place with mixed brass.

Neck thickness data:

Factory Blackout brass

Gemtech (factory 300 BLK) - 0.011"
PNW Arms - 0.011"
RP - 0.010"

Converted brass

Good:
ADI - 0.012"
Aguila - 0.012"
A USA - 0.012"
FC - 0.013/0.014" [Note 1]
GFL - 0.012" (Fiocchi) Some GFL may have different thickness
HB - 0.013"
Hornady (223 headstamp) - 0.011"
Hornady (nickel 223) - 0.012"
IK03 - 0.012" [Note 4]
IMI - 0.012" [Note 4] Listed on both lists, but seems like more often good than bad.
IVI - 0.013"
IVI ('85) - 0.012" (runs great)
LC - 0.011"
LC (converted blank) - 0.012"
M193 - 0.011/0.012"
Norinco 223 - 0.010"
NOSLER - 0.012”
PERFECTA 223 rem. - 0.012"
PMC - modern "bronze" and "X-tac" are good, older PMC with small letters may have problems
PS - 0.011/0.012"
PSD - 0.011"
RA - 0.013"
RA ('69) - 0.012"
RP .223 - 0.011"
SSA - 0.012"
TAA - 0.013-0.014" [Note 4]
Tula - 0.0115"
TW 67 - 0.012”
TZZ - 0.012"
WCC - 0.010/0.011" (Some less common WCC headstamps run thicker, but the majority are good to go)
Winchester - 0.011"
WIN NT - 0.011"
WMA 15 - 0.011"


Thick neck wall, bad without neck turning:

AB 556 - .015" to .016"
ATI - 0.015" [Note 3]
CBC - 0.014/0.015"
CJ6 - 0.015"
CJ 8 - .014"
DNL - 0.016"
FNM - 0.016" [Note 3]
FRONTIER - 0.015"
GECO - 0.015/0.016"
Hot Shot - 0.014" [Note 3]
HRTRS ( Herters?) - 0.017"
ICC - Reported as bad
IK03 - 0.015" [Note 4]
IMI - 0.015" [Note 4]
IVI - 0.015"
KFA .223 REM - 0.015"-0.019"
L2A2 - Reported as bad
MKE13 - Anecdotally reported as troublesome
MPA - 0.015"
Norma - 0.015"
NPA - [Note 3]
PMC (old headstamp) - 0.015"
PMP - 0.015"
PPU - 0.014/0.015" [Note 3]
RAM 223 - .014"
RORG - 0.015"
RWS - 0.014-0.015"
S&B - 0.015/0.017"
SADU - 0.014/0.015”
TAA - 0.013-0.014" [Note 4]
SADU 5.56 - 0.014-0.015"
Wolf Brass .223 - 0.014"

http://www.300blktalk.com/foru...ic.php?f=141&t=88599

Hey jmorris...thank you for this post ...good brass vs. bad brass for forming .300 BO...keeping it to the forefront!

Thanks for the list.
I will check the cases that I formed this weekend.