MidSouth Shooters SupplyWidenersRepackboxTitan Reloading
RotoMetals2Load DataReloading EverythingLee Precision
Inline Fabrication
Results 1 to 8 of 8

Thread: 7 TCU gauges

  1. #1
    Boolit Buddy
    Join Date
    Jun 2005
    Location
    central Arkansas
    Posts
    337

    7 TCU gauges

    I just received a new barrel for a Savage rifle in 7 TCU. I didn't think about the gauges till the barrel arrived. Can I use 223 gauges? If not, is there a work-around. It looks like gauges will take a couple of months to order the correct ones. I will be forming the brass from 223, and I do not have any brass that is the correct headstamp or has been fire formed.

  2. #2
    Boolit Master
    Join Date
    Jun 2010
    Location
    WNY
    Posts
    2,502
    I must be having a senior moment, but what gauges are you referring to? I fireformed hundreds of 7tcu cases from .223 and never used any gauge in the process. Also, what is “the correct headstamp”? I used whatever was readily available and it all worked fine. I shot IHMSA Silhouette for years with my 7tcu and took a few deer with it. All I ever did was take .223 ammo and chamber it, pull the trigger, and I instantly had 7tcu brass. I don’t know if that’s an acceptable way to do it, but I shot an awful lot of 40x40s with both my 10” and 14” barrels and never had a problem with accuracy or my gun. I’m curious as to what's changed?

  3. #3
    Boolit Master
    toallmy's Avatar
    Join Date
    May 2015
    Location
    easternshore of va.
    Posts
    2,996
    I believe the op is referring to a set of headspace gages to install a new barrel on a savage riffle .

  4. #4
    Boolit Master
    Join Date
    Jun 2010
    Location
    WNY
    Posts
    2,502
    Quote Originally Posted by toallmy View Post
    I believe the op is referring to a set of headspace gages to install a new barrel on a savage riffle .
    Yep, I was having a senior moment. Thanks

  5. #5
    Boolit Master
    Czech_too's Avatar
    Join Date
    Nov 2009
    Location
    Ohio
    Posts
    652
    As per the interchangeability chart from PTG & JGS, .223 headspace gauges can not be used for the 7TCU, nor the other TCU cartridges.

    I went through something similar recently, only I was going with the 6.5TCU using a Savage action. I ordered the gauges directly from PTG and had them in a couple of weeks, as I recall. It didn't take 4 months like it did for the barrel, from a different mfg.

    There is a post, by me, on how I formed the brass for a 7TCU.

    NSB, drop me a PM
    Last edited by Czech_too; 08-31-2021 at 04:44 AM.
    https://wbrpc.org/

    genealogy, another area of interest

    feedback - http://castboolits.gunloads.com/show...9613-czech_too

  6. #6
    Boolit Buddy
    Join Date
    Jun 2005
    Location
    central Arkansas
    Posts
    337
    That's what I was afraid of but was hoping for a different answer.
    Thanks everyone

  7. #7
    Boolit Man

    Join Date
    Dec 2008
    Location
    NW Wyoming
    Posts
    80
    Just set your dies, form the brass, and set the headspace to that formed brass. Don't over-think it.
    Let's go Brandon!

  8. #8
    Boolit Grand Master Nobade's Avatar
    Join Date
    May 2005
    Location
    SE WV
    Posts
    6,216
    223 Ackley Imp gauges are what you want to set the barrel headspace. 7mm TCU is just a necked up 223 imp. At least every one I have ever measured in the shop.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check