A little help with a measurement please!

[fatelvis]

Can someone please give me the exterior neck measurement of a Lapua case loaded with a Sierra 140MK or comparable? One that the neck has not been cut. I want the measurement so I can order a custom honed neck sizing die from Forster.
Thank you Guys!

 

[OMW57]

unturned, 139 scenar .289
Ill go check with a new srp case
OK, new srp lapua case, neck thickness .0135, 139 scenar .291
Wow, are the sierras that much larger?
Im guessing the kid turned the older lrp brass

 

[Bill Norris]

Just double checked to make sure. This is what I'm getting on a 140 gr. Sierra MK in my 260AI.

 

[Dusty Stevens]

What cartridge? I can measure a 6.5x284 and a 6.5x47 here in a bit

 

[OMW57]

My measurements was 6.5 creedmore

 

[whatsupdoc]

.292 Lapua srp 6.5 creed

 

[whatsupdoc]

Can someone please give me the exterior neck measurement of a Lapua case loaded with a Sierra 140MK or comparable? One that the neck has not been cut. I want the measurement so I can order a custom honed neck sizing die from Forster.
Thank you Guys!

I have a .288 Forster honed die that I use on 6.5 Lapua brass, I push a mandrel through after.

 

[Fast14riot]

Just get a Lee collet neck die and be done with it.

 

[Dusty Stevens]

Or a FL bushing die and really be done with it

 

[1shot]

Or a FL bushing die and really be done with it

^^^^^^^^^^^^^^^^^^ this.

 

[Webster]

Can someone please give me the exterior neck measurement of a Lapua case loaded with a Sierra 140MK or comparable? One that the neck has not been cut. I want the measurement so I can order a custom honed neck sizing die from Forster.
Thank you Guys!

I thought you just sent them a few fired cases to get a custom die. No measurements needed. There cannot be that much difference in bullet diameters? Buy a Redding FL Type S bushing die and you can adjust the neck tension. With a custom die you are stuck with one tension unless you want to buy a bunch of expander mandrels which means you wasted money on a custom die. Mandrels can only make the neck bigger not smaller.

added later:
I think submitting cases to custom machining a die is for a tighter fit in your chamber. Your still stuck with sizing to one neck diameter if it isn't a bushing die. You cannot make an average rifle into something very accurate by measuring and weighing everything. A honed die with mandrels to expand is just extra work. I shoot a 6BR and a 6BRX for varmint hunting. $720 for a Kreiger barrel. Both rifles shoot under .400" all day long. .250" groups common. A few under 0.200". I don't weigh or sort anything.

 

[Rat Rifle]

I thought you just sent them a few fired cases to get a custom die. No measurements needed. There cannot be that much difference in bullet diameters? Buy a Redding FL Type S bushing die and you can adjust the neck tension. With a custom die you are stuck with one tension unless you want to buy a bunch of expander mandrels which means you wasted money on a custom die. Mandrels can only make the neck bigger not smaller.

I wouldn’t risk it without sending them a dummy round.

 

[Dusty Stevens]

I thought you just sent them a few fired cases to get a custom die. No measurements needed. There cannot be that much difference in bullet diameters? Buy a Redding FL Type S bushing die and you can adjust the neck tension. With a custom die you are stuck with one tension unless you want to buy a bunch of expander mandrels which means you wasted money on a custom die. Mandrels can only make the neck bigger not smaller.

Then you need the 21st century bushing sizer

 

[fatelvis]

What cartridge? I can measure a 6.5x284 and a 6.5x47 here in a bit

6.5 creed

 

[fatelvis]

.292 Lapua srp 6.5 creed

Thank you guys

 

[Ray123]

6.5 Creedmoor loaded rd neck diameter over seated 150 gr SMK.

Can someone please give me the exterior neck measurement of a Lapua case loaded with a Sierra 140MK or comparable? One that the neck has not been cut. I want the measurement so I can order a custom honed neck sizing die from Forster.
Thank you Guys!

Loaded round 6.5 Creedmoor diameter of neck with seated 150 gr SMK
With these case brands
Lapua SR primer = .2915"
Hornady = .292"
Winchester = .292"
Starline = .2915"
Update : I do not neck turn my bushing is .290" and it sizes all the cases above plus all range brass for the AR 10.

 

[Clancy]

You need to get your OWN batch of brass and measure it. It’s all over the map these days, even the good stuff. Sure, a whole lot of batches fall very close to the target number, but for example I’ve got a nearly .0025 thou spread on 3 batches of 6.5-284 brass. It’s just not worth guessing at.

 

[6BRA]

This alone is why to turn them. Controlling one variable is difficult. Controlling multiple variables.....scratch your head. I hate bushings..but even your odds.