Lapua and Norma 6br neck width

[3855kidd]

I have a used rifle I am trying to load for. I was give fired Norma cases that was fired in this rifle and measure .271. I was also given 150 new Lapua cases and 5 benchmark cases with bullets seated differently. The "loaded" Lapua brass measures .268.
I was given a Redding sizing die with .266 bushing. This all makes sense to me, but when I size the used Norma, the bullet is loose. The neck wall is thinner than the Lapua brass.
Question is, do I go with a smaller bushing to shoot the Norma,
or just forget it and stick with the Lapua?
Thanks for any comments or suggestions, this is new to me.
Cheers

 

[Rtheurer]

Hmmm I use Norma Brass and my loaded rounds measure .269 and I use a .268 bushing and everything works just fine. Im on my 11th loading on this Norma brass. I wonder if the necks have been turned down?

RT

 

[3855kidd]

I did not measure the thickness, but I can see the Norma has a smaller wall.
I may be better off to stick with the new brass.
I may not be good to neck down to .264 lets say with a .271 chamber.
The cases are usually turned down because of a tighter chamber, right?

 

[Rtheurer]

I would say its been turned down based on my loaded round measurments. I would also say your chamber may be a .272 NK with some spring back of the brass being .271. All off which is normal. I wouldnt thow that brass away by any means. You might be suprised how well the smaller/thinner necks shoot in the larger Chamber. You will need a smaller bushing for the Norma since its some how now thinner than the Lapua. maybe a good option would to be to pick one batch of brass and use it till its no longer good then move to the other.

RT