6.5x47 Lapua neck.

[tonyb]

Can someone give me a loaded neck diameter. I believe I have heard .290 to be a pretty solid number, but just want to be sure. I am going to be using recent production brass. I have sent two pm's to E.C. over the last two days with zero response.

Thanks for your help in advance,

Tony.

 

[ShootDots]

My necks are "turned / cleaned up" and a loaded round measures .289... I would imagine an unturned neck is right at .290..

 

[Erik Cortina]

Can someone give me a loaded neck diameter. I believe I have heard .290 to be a pretty solid number, but just want to be sure. I am going to be using recent production brass. I have sent two pm's to E.C. over the last two days with zero response.

Thanks for your help in advance,

Tony.

I'm really sorry, I meant to measure some new brass but I haven't had time.

I always turn brass so I don't know off the top of my head. Sorry.

 

[stubbicatt]

I turned mine to .289 for a .293 neck. Seems to work so far, as i am still doing barrel break in and load development. But as they say, I haven't wet the bed yet, but the night is long...

 

[tonyb]

Can someone give me a loaded neck diameter. I believe I have heard .290 to be a pretty solid number, but just want to be sure. I am going to be using recent production brass. I have sent two pm's to E.C. over the last two days with zero response.

Thanks for your help in advance,

Tony.

I'm really sorry, I meant to measure some new brass but I haven't had time.

I always turn brass so I don't know off the top of my head. Sorry.

I understand, and thanks for the pm response Eric.

Tony.

 

[flatlander]

tonyb - Just measured necks of a couple of loaded rounds (twice-fired brass, loaded with S107MK), and came up with .288". My reamer print shos a neck dia of .2944", so unless I run into brass with variable neck wall thickness, I'll never need to neck turn.

 

[Pappy42]

Lapua brass, not turned, Berger 130, .290 loaded neck diameter.

 

[Mega]

New unturned Lapua (Blue Plastic Box) probably a couple of years old, Berger 130gr VLD Target, Mitutoyo Digital Micrometer shows 0.29055" give or take around the neck but in general up to 0.0005-6" over 0.29000" including pressure ring. A lot of neck tension straight out of the box so I would not use them myself without running a mandrel down the neck to relieve some tension first normally.

Depends on the bullet loaded so without knowing exactly which bullet being used it can vary.

 

[Judd]

Lapua brass, not turned, Berger 130, .290 loaded neck diameter.

That is also my measurement before turning but using 136 Lapua Scenars. Just started working up a load so not sure how it's going to shoot.

 

[terryperkins]

Can someone give me a loaded neck diameter. I believe I have heard .290 to be a pretty solid number, but just want to be sure.

Just measured my ammo, Lapua brass (obviously), and 140 Berger LRBT... .290" neck loaded. Not neck turned.

 

[Mega]

Just a comment here but everyone seems to be rounding off neck diameter measurements or are they using calipers that don't have the accuracy of a micrometer.

My point, my calipres (Mitutoyo Digital) will show a neck diameter of 0.290" but using a higher grade micrometer it's more like half a thou bigger. If you are using a tight loaded round neck to chamber clearance that is a big factor where you can loose nearly 1/4 to half your clearance from taking the wrong measurement.

Also if using calipres with a narrow measure width blade compared to a micrometer are you measuring at the position of the pressure ring in the neck.

 

[Erik Cortina]

I believe for a no turn neck, a reamer with a .294" neck diameter is perfect.
Also the most versatile freebore is .175"

 

[tonyb]

Thanks everyone for taking the time to answer my questions!

Tony.

 

[fm1947]

No turn is .294 I have one.