loaded neck diameter 6.5PRC with lapua brass?

[AndrewB]

does any one have some loaded 6.5 PRC with Lapua brass that they could give me a neck diameter on?

 

[Conaso]

I would assume for using any Lapua brass using a projectile having a 6.5mm diameter...
Lapua case neck thickness measures .014”, bullet diameter measures .264”: 0.264 + (0.014 x 2) = 0.292. To get 2 thousandths "neck tension" a 0.290” bushing is needed. Because of brass "spring back," someone will actually end up with approximately 1.5 thousandths grip or "neck tension."

 

[Gb300wm]

0.2935” with Lapua brass
0.2950” with adg brass
0.2945” with nosler brass

 

[DocBII]

Andrew,

0.293 average, 0.292-0.294 at various points on a couple of Hornady factory rounds.

HTH,
DocBII

 

[AndrewB]

Thank you guys. Extremely helpful.

 

[nakneker]

.2925-.2935, Lapua brass, with 156 Bergers and Accubond 142s.

 

[Straightshooter1]

I would assume for using any Lapua brass using a projectile having a 6.5mm diameter...
Lapua case neck thickness measures .014”, bullet diameter measures .264”: 0.264 + (0.014 x 2) = 0.292. To get 2 thousandths "neck tension" a 0.290” bushing is needed. Because of brass "spring back," someone will actually end up with approximately 1.5 thousandths grip or "neck tension."

Lapua brass neck thickness isn't always .014", as in one lot of my 6.5 PRC brass it ranged from .0141 to .0161. Because of this, I do turn the necks to .014".

Here's some measurements I took when I got some Peterson brass I wanted to compare (interestingly, the neck OD on the virgin brass was pretty consistent):

 

[Clancy]

As you can see, it’s best to get your brass in hand before selecting a Reamer, unless you’re turning.

Even the best is all over the place. I’ve seen Lapua blue box 6BR from .2675 to .272. Think about that for a second.

I’m going to keep preaching this until it sticks.