6BR trim lenght

[Dogfox]

Hi
please could you tell me what the trim lenght is for the 6Br case.
Thanks Neil

 

[Bobs243Ackley]

Hi Neil,

The trim to length for the 6BR is 1.550" according to the 5th edition of the Sierra Reloading Manual.

Cordially,
Bob Blaine

 

[Dogfox]

thank you
dogfox

 

[Forum Boss]

Many of us leave them a little longer. After one firing I trim and re-chamfer. I trim to 1.556" which is usually about the shortest case in the lot. Some guys leave 'em longer than that, maybe 1.557". I don't think it makes much difference,provided there is not chamber interference issue), as long as your cases are consistent.

 

[Glenn]

Which 6mm BR do you have, the 6mm BR Remington,OAL 1.520"), or the 6mm Norma BR,OAL 1.560")?

 

[Preacher]

Most of the chambers vary so much in the trim length, that I take a new case and bore out the flash hole so my Hawkeye bore scope will fit through it, and then I can see where it sets as far as the chamber is concerned, and then set my trim length from that. When they are cut to short they seem to leave a residue right at the end of the chamber just before the throat. Not sure if that restriction means anything or not but if it's not there I seem to sleep better.

 

[sewwhat89]

Preacher, if you are using a borescope to set your trim length, do you try to flirt with a max OAL brass to increase your case volume? I am just curious as I had not thought of that. That could open up a whole world of possibilities.