Go No Go For 6 BRA

[Curmudgeon]

Morning, will the 6 br go no go gauges work for a 6 BRA ? I am thinking they will since neck shoulder doesn’t change. Thanks

 

[Dusty Stevens]

Headspace and Ackley Improved Cartridges – P.O. Ackley

ackleyimproved.com

Quick search pulled this up. Look right below the 30-30 case picture for the info you need

 

[Terry]

That's what I use.

 

[46and2]

If it is an actual Ackley chamber it should be a couple of thousandths tight on virgin brass.

 

[Terry]

Easily done with a 6BR go gauge. You can fit it with the go gauge while chambering. You can get the chrush when torking it down, if that's what you want.

 

[Curmudgeon]

OK, so .004 less than a go gauge. This said to equal 1 thread. Any guess how much a turn on a Rem. thread barrel is .004? Sounds like using a 6 br case might be better than go gauge. Pull extractor and ejector then close bolt tight on case. Am asking because I want to buy a prefit barrel to eliminate wait time from smith. I could set up dial indicator to measure. Maybe I’ll wait for smith. Thanks all

 

[jkohler]

One full turn on a 16 pitch thread is .0625

 

[Kratos]

OK, so .004 less than a go gauge. This said to equal 1 thread. Any guess how much a turn on a Rem. thread barrel is .004? Sounds like using a 6 br case might be better than go gauge. Pull extractor and ejector then close bolt tight on case. Am asking because I want to buy a prefit barrel to eliminate wait time from smith. I could set up dial indicator to measure. Maybe I’ll wait for smith. Thanks all

R700 is 16 tpi I believe, so one turn is 0.0625 inches, and 0.0625/0.004 = 1/15.625 turn for 0.004.

 

[Curmudgeon]

Brilliant, thank you. Now I can figure increment for 1/15.625 turn.

 

[dfrosch]

For $5 you can rent the go gage. Put a piece of tape on the case head to turn it into a no go.

6mm BRA (BR Ackley Improved) - 4D Reamer Rentals

6mm BRA (6mm BR Ackley Improved), chamber reamer.

4drentals.com

 

[dfrosch]

use the no-go for a go

No. Use the go for an Ackley no go.

 

[Curmudgeon]

I am making it too complicated. I can measure .064 on barrel at recoil lug turn and tighten then check for tight fit of case. Can always be loosened or tightened. Thanks all. I have an idea what it feels like since I shoot a 243 Ackley. Cheers