to turn necks or not ?

[steveyrock]

I have to believe that even with the great quality of the Lapua br brass it would be beneficial to still go with a tightneck chamber.I just can't bring myself to chamber a 310.00 dollar barrel with a .272 neck and expect top accuracy.I am planning on ordering a reamer with a 264 neck. YOUR THOUGHTS PLEASE.

I am sure this has been beat to death already but I would like to hear others opinions.

 

[dreever]

Stevie,

I agree, if your looking for every little bit of accuracy even though Lapua brass is pretty darn good out of the box you'll still turn necks.

However, you don't need to go that tight,.264). My Reamer is a .269 neck. You can turn the brass with a skim cut all the way around. Works great, just one pass with the turner and your done.

A lot of the PPC crowd are getting away from the .262-.264 necks and are now going with the .269. You just don't have to hit the brass that hard anymore.

Danny

 

[kaferhaus]

Be aware that the past couple lots of 6BR brass has had thicker than normal necks....

I have 2 6BRs with 271 necks and the previous lots of brass worked fine right out of the box. I bought 300rds of it last month and the necks had to be turned on all of them as they're .0016 thicker that the previous batch that I have.

MANY guys have discovered this the hard way with excessive pressures being the result.

So if you order new brass, you'd better check it before you load it.

 

[Aussie_bob]

Another good reason for turning necks is that if you are using bushing dies your neck tension will all be uniform i have just gone back through my 30BR brass which has been fired 5 times and cleaned the inside of the necks and re-turned the outside some just brushed the surface some skimmed a fine film off and others were patchy but none took any from the neck shoulder junction, Seems this area has stayed the same or thinned slightly.

 

[tightneck]

Concentricity is the most well known reason to turn necks, but what Aussie Bob mentioned is eaqually important. Uniform neck tension from case to case can mean the difference between good groups and so-so groups. The thing I dont like about .271 or .272 reamers is that you just dont know what the next lot of Lapua brass will measure. Sure they are very consistant, but as we are witnessing now, they're tolerances can flucuate too. If you bite the bullet upfront and decide to turn your necks, you wont have to worry about that next lot fitting in your chamber.