6mmbr redding bush

Get or give advice on equipment, reloading and other technical issues.

Moderator: Mod

jmc
Posts: 67
Joined: Mon May 19, 2014 7:08 pm
Location: Warrnambool

6mmbr redding bush

Post by jmc »

Hi all just got my first 6mbr second hand came with dies the bushing die size is 262 is this ok or need different thanks
DenisA
Posts: 1544
Joined: Wed Nov 09, 2011 7:00 pm
Location: Sunshine Coast, QLD
Has thanked: 167 times
Been thanked: 137 times

Re: 6mmbr redding bush

Post by DenisA »

I use a Wilson .266 bush with unturned Lapua brass for a half thou neck tension. I estimate a .262 will give yo approx .004" to .005" neck tension. It'll still work fine but I prefer less neck tension.

I have a redding .266 bush which actually sizes to .264. Watch those Redding bushes.
Barossa_222
Posts: 417
Joined: Sat Feb 08, 2014 6:58 pm
Location: Barossa Valley
Has thanked: 188 times
Been thanked: 176 times

Re: 6mmbr redding bush

Post by Barossa_222 »

You didn't mention whether the gun was chambered for a tight neck or not. I run both a Dasher and a 6BR, both with no turn necks, and use a .267 bush for both of those with very good results.
DaveMc
Posts: 1454
Joined: Mon Aug 22, 2011 6:33 pm
Has thanked: 25 times
Been thanked: 93 times

Re: 6mmbr redding bush

Post by DaveMc »

yes - with a 0.262" bush it certainly sounds as though you have a tight chamber. no turn bushings are normally 0.266" to 0.268".

Please post the chamber neck dimensions and diameter of the neck on a loaded round before proceeding further. It is important you get this correct and may have to turn the necks on your brass before going any further.
Last edited by DaveMc on Mon Jan 12, 2015 6:32 pm, edited 1 time in total.
jmc
Posts: 67
Joined: Mon May 19, 2014 7:08 pm
Location: Warrnambool

Re: 6mmbr redding bush

Post by jmc »

Hi all I'm new to all this I brought the rifle came with dies and 50 fired cases what do I do to work this out ?
seb
Posts: 41
Joined: Sun Jun 22, 2014 8:07 pm

Re: 6mmbr redding bush

Post by seb »

Guys, if I have PTG 6mm BR Lapua fin reamer w/ .272 neck, using blue box Lapua 6 BR Norma brass w/ no turn (or w/ very light turn) and Redding-S FL busing die, am I correct to buy .269 bushing + 2nd .267?
I can't find .268 bushing, btw.

What is your average neck OD w/ bullet seated using Lapua brass (blue box) no turn... say with Berger 105gr match hybrid?

(Will build a plain 6 BR, soon when I have the time... still collecting the components at this moment).

Another question is, when you use Berger match hybrid, would the regular seater stem of Wilson inline die (i.e. the nose/cone) work just fine / doesn't "crash" the bullet tip when seating?...and how with VLDs?

Thanks,
seb.
DaveMc
Posts: 1454
Joined: Mon Aug 22, 2011 6:33 pm
Has thanked: 25 times
Been thanked: 93 times

Re: 6mmbr redding bush

Post by DaveMc »

jmc - best if you can track down previous owner and ask for chamber dimensions.


If no luck there - grab a micrometer and measure the neck diameter of a fired round (before sizing) but be aware there will be some springback so the chamber could be 0.000 to 0.002 inches (or more) larger than this. It will however give you an idea.

also size one case with the neck bushing you have and seat one projectile then measure the loaded round neck diameter. come back to us with these dimensions so we can give you a starting idea.
Barossa_222
Posts: 417
Joined: Sat Feb 08, 2014 6:58 pm
Location: Barossa Valley
Has thanked: 188 times
Been thanked: 176 times

Re: 6mmbr redding bush

Post by Barossa_222 »

My chamber is cut for no turn neck "blue box" Lapua brass and has a .274 neck. My loaded rounds measure at .266-.267. I tried bushings from .265 to .268, but I found very consistent seating and good feel using the .267 bushing and then using a Sinclair expander mandrel. This takes out any variances in the neck thickness.
seb
Posts: 41
Joined: Sun Jun 22, 2014 8:07 pm

Re: 6mmbr redding bush

Post by seb »

Thank you for the info! Got it.
seb.
jmc
Posts: 67
Joined: Mon May 19, 2014 7:08 pm
Location: Warrnambool

Re: 6mmbr redding bush

Post by jmc »

Sorry for the late reply ok a fired case from my rife measures 0.271 and a loaded round 0.270
shooter mcreid
Posts: 322
Joined: Sat Mar 01, 2014 5:26 pm
Location: Ipswich
Has thanked: 5 times
Been thanked: 6 times

Re: 6mmbr redding bush

Post by shooter mcreid »

Jmc, I think that means you have a standard chamber or close to it. With that bushing you are running 8 thou tension which I believe is on the tight side. Should work fine, however you could try a lighter tension by going 0.266" or 0.268" for 4 or 2 thou tension respectively. A lighter tension be benificial however if it's shooting well then don't change it. Someone might want to double check but I think I got the numbers right.
jmc
Posts: 67
Joined: Mon May 19, 2014 7:08 pm
Location: Warrnambool

Re: 6mmbr redding bush

Post by jmc »

Ok thanks I'm having some trouble with my Amax tip when seating told it could be to tight
shooter mcreid
Posts: 322
Joined: Sat Mar 01, 2014 5:26 pm
Location: Ipswich
Has thanked: 5 times
Been thanked: 6 times

Re: 6mmbr redding bush

Post by shooter mcreid »

Well that sounds like enough of an excuse to try a larger bush. Good luck with it.
jmc
Posts: 67
Joined: Mon May 19, 2014 7:08 pm
Location: Warrnambool

Re: 6mmbr redding bush

Post by jmc »

Thanks for your help
johnk
Posts: 2211
Joined: Sun Sep 07, 2008 7:55 pm
Location: Brisbane
Has thanked: 71 times
Been thanked: 92 times

Re: 6mmbr redding bush

Post by johnk »

No chance that the seating die hasn't enough clearance for the Hornady tips, is there?
Post Reply Previous topicNext topic