Correct dies for 6mmBR Norma ??
- Thread starter rmist
- Start date
By CIP regulations (which is the requirement that created the 6mm BR Norma), the cases and chambers are the same. The difference is in the throat length and the rate of twist. The Rem BR was set up around 68-70 grain Benchrest bullets, while the Norma version was long throated and given a faster twist to handle the 105 grain match bullets for 300 meter competition. Gets a bit lost in translation here in the US since we don't require this, but CIP regulations demand that anytime something is changed, throat length, twist, bore/groove diameter, etc., the cartridge has to be given another designation, as in the case of the 6mm BR Rem and 6mm BR Norma. But yes, the case is the same and can be used in either. Ditto on the dies.
The reamer used on my pistol...I don't know...I had it made by Bullberry. It is a stainless Encore with a 8 twist heavy tapered 21" barrel with a .273" neck for easier extraction from the T/C action with a 4x12 Burris pistol scope. But it is a 6mm BR as orded and marked on the barrel.
Thanx again,
Dave
Thanx again,
Dave
KevinThomas said:
This is not totally true. The original 6MM BR Rem was based on a OAL cart. length of 1.520, as designed by Remington's Jim Stekl, the current spec is 1.560. If someone has a chambering based on the orig 6MM BR Rem, a 6MM BR Norma out of the box will not fit.
This is right from the 6MM BR site: "What is the Correct OAL for the Case? New Lapua brass measures 1.556-1.557". SAAMI spec for the 6mm BR Norma case is 1.560". By contrast the OAL spec for 6mm BR Remington is 1.520". The Lapua brass is headstamped 6mm BR Norma-Lapua. We trim all our cases to 1.555" when any one reaches 1.560" or longer. "
Ed
P.S.
Remington cut over to the 1.560 spec in 1989, prior to that it was the 1.520
Remington was the first to make 6BR brass. Couple years later Norma came out with their version, but to avoid patent infringement they made the brass longer (1.560" vs 1.520") and the case head was about .002" "fatter", just enough so the Norma would not fit in an original Remington chamber.
Shortly after that, Lapua, in agreement with Norma brought theirs out.
The die makers are only adding to the confusion when they label their box's 6mm B.R. Remington.
Shortly after that, Lapua, in agreement with Norma brought theirs out.
The die makers are only adding to the confusion when they label their box's 6mm B.R. Remington.
Ed,
Perfectly correct about the dimensional changes to the case over the years, and there could be some confusion with older guns or chambers done with older reamers.
As far as the Headstamp, the Lapua logo merely denotes that they were manufactured by us, not that we have any claim to the cartridge design itself.
Appreciate your pointing out the history of the case and the subsequent changes.
Perfectly correct about the dimensional changes to the case over the years, and there could be some confusion with older guns or chambers done with older reamers.
As far as the Headstamp, the Lapua logo merely denotes that they were manufactured by us, not that we have any claim to the cartridge design itself.
Appreciate your pointing out the history of the case and the subsequent changes.
The SAMMI case length for the Rem 6BR is 1.520" and the SAMMI length for 6BR Norma is 1.560" . There is also a difference in the two shoulder lengths , the Rem being .163" and the Norma at .175" . My original 40X in 6BR Rem. will not accept a 6BR Norma case until I push the shoulder back and trim .KevinThomas said:
The main difference between Norma and Remington brass.in 6 mm Br is the shoulder. The Remington shoulder is 30 degrees and the Norma is 60 degrees.
The chambering difference is the Norma is sized to handle the 100 plus grain bullet some say the 105 grain Berger some say the 109 grain. The Remington BR chamber was sized for a lighter bullet. Something around the 75 grain.
Jack
You might want to recheck that statement, Jack. The shoulder angle is unchanged. I believe CIP (European SAAMI) uses combined angle of both sides for their angle spec.
i.e. The Norma #2 manual has the 6BR at 60* but also has the standard 06 at 35*.
^^^^^LOL- get a life - in other words
Awake at midnight to lambast those trying to help? Who needs to get outside?
hoz53
Gold $$ Contributor
yeah im one of the ones 4 sure
Because the WooHan will be gone too!
rkittine
Gold $$ Contributor
Someone who was not a member 8 years ago, might be interested.
I just bought some Lapua 6mmBR Norma factory ammo, shot it, loaded it, using Wilson Neck only Size Die and Wilson Seating die and shot it and loaded it and shot it again then sent 5 cases that had been shot in that chamber three times along with my reamer print to Whidden and they took care of the rest.
Bob
I just bought some Lapua 6mmBR Norma factory ammo, shot it, loaded it, using Wilson Neck only Size Die and Wilson Seating die and shot it and loaded it and shot it again then sent 5 cases that had been shot in that chamber three times along with my reamer print to Whidden and they took care of the rest.
Bob
Dolomite
Silver $$ Contributor
That good information, how long did the custom die take from order to receipt?
I did the same for my 308 lapua Palma chamber brass, shot it 4x and sized it only using the Whidden stock die and sent him the brass. He said I needed a custom die because the base wasn't being sized down enough. My custom die order just made it for the December production.
I'm hoping I don't need a custom die for my 6Br, the wait might kill me. I just started firing the factory lapua brass. I'm hoping the Redding S die will work but if not the brass will be sent to Whidden for a custom die.
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