Tolerances for 7mm TCU for Nosler bullets

Smiter_Co · October 31, 2007, 12:04 PM

I'm sorting 6 crates of reloading gear and sorting 1000's of cases and I want to make sure the differences I'm seeing in a particular case aren't out of the ordinary.

NATO 5.56 mm brass
Rem .223 brass
resized same way; looks like the 7 mm TCU for Nosler bullets

Measurements listed in The Complete Reloading Manual for the Thompson/Center Contender published by Loadbooks USA:

rim .378
body 1.455
to shoulder/neck 1.482
to mouth 1.750
mouth .304

My measurements:

rim .377 difference of -0.001
body 1.447 difference of -0.008
to shoulder/neck 1.487 difference of +0.005
to mouth 1.7315 to 1.743 (appearance of uneven trim) difference of -0.015 to -0.007
mouth .284 difference of +0.020

I'm fairly new to reloading and weeding through a dead guys stuff. There are no labels to help me with this one. I've been looking online and at any book I can...if it's not the 7mm TCU then what could it be?

October 31, 2007, 12:04 PM	#1
Smiter_Co Junior Member Join Date: October 31, 2007 Posts: 7	Tolerances for 7mm TCU for Nosler bullets I'm sorting 6 crates of reloading gear and sorting 1000's of cases and I want to make sure the differences I'm seeing in a particular case aren't out of the ordinary. NATO 5.56 mm brass Rem .223 brass resized same way; looks like the 7 mm TCU for Nosler bullets Measurements listed in The Complete Reloading Manual for the Thompson/Center Contender published by Loadbooks USA: rim .378 body 1.455 to shoulder/neck 1.482 to mouth 1.750 mouth .304 My measurements: rim .377 difference of -0.001 body 1.447 difference of -0.008 to shoulder/neck 1.487 difference of +0.005 to mouth 1.7315 to 1.743 (appearance of uneven trim) difference of -0.015 to -0.007 mouth .284 difference of +0.020 I'm fairly new to reloading and weeding through a dead guys stuff. There are no labels to help me with this one. I've been looking online and at any book I can...if it's not the 7mm TCU then what could it be?