6 dasher Norma Fl sizer die

[Cool Tool]

+1 ..... exactly !.!.!

All that is needed to be measured is the widest part of the brass (near the base/web/.200-line of course) both "before sizing" and "after sizing". It does not take a "blade mic" to get those measurements, and I prefer a micrometer over a blade mic myself, because a micrometer can more accurately find the widest part, verses a blade mic having to be pin pointed on a location for measure, which can lead to error.

A caliper can work as well, but a micrometer is the best measuring tool for the job.
Donovan

Donavon a set of blade mikes are more precise then a set of regular mikes bar none .

 

[Phil]

Looking for a high point is easier to do when you have a larger surface, the blade mic. has a smaller surface area.

As for which is more accurate, the one that is calibrated correctly and often, my choice is American made Starrett.

The machine shop regularly sends stuff to be calibrated, mine just kind of hitch hikes along for the ride......

Phil.

 

[dmoran]

Donavon a set of blade mikes are more precise then a set of regular mikes bar none .

George -
I agree when measuring a known fixed spot, but not for finding the widest spot and measuring it.
Or so is my opinion.... and why I elect to use a micrometer over a blade mic for the task.
Donovan

 

[expiper]

I must measure different than most,,,I like to use blade mikes/calipers to check thread depth (over wires is most accurate,,) and find it ez for my feeble fingers/hands to use the wide jaws on dial calipers or mickes rather than get them crooked when usin the knife edge,,,,just sayin,,,I am not a pro,,,Roger

 

[Cool Tool]

George -
I agree when measuring a known fixed spot, but not for finding the widest spot and measuring it.
Or so is my opinion.... and why I elect to use a micrometer over a blade mic for the task.
Donovan

you are right about one thing ever one is different when it comes to measuring I measure in tenths ever day an I better be right..

 

[Phil]

Tom,

True.....

As long as you use the same caliper, and get two measurements, before and after sizing in the die you only have to subtract the difference to know how much the die is sizing the brass....

Phil.

 

[Phil]

Roger,

I use a small vice to hold the Starrett Mic. so that it`s one less thing i have to do.....

I spotted pictures Tom had posted and stole the idea from him, besides...i had a small vice sitting around here collecting dust......

Phil.

 

[ASbobcat]

Is there anything wrong with using a standard Forster 6 Dasher die?

Has anyone tried making 6 Dasher Norma brass from 6.5x47 Lapua?

 

[Phil]

Has anyone tried making 6 Dasher Norma brass from 6.5x47 Lapua?

I have considered this, has anyone already done it????

Phil.

 

[ASbobcat]

I have considered this, has anyone already done it????

Phil.

Here's why I'm asking. From what I've read on this forum, the new Norma brass doesn't appear strong enough to handle max loads with adequate brass life and there would not be any need for fire forming.

 

[Kyle Schultz]

Update on Harrells D4 Dasher die - -

Just to "get it straight from the horse's mouth" I called Harrells today to buy one of their D4 dies to test one out for myself.

I sent 2 fired pieces of Norma 6 Dasher brass to Harrell's. My reamer spec is pretty standard; 0.4730" at the BF, 0.4708" at the 0.200" line, and 0.4600" at the shoulder.

They sent me back a D1.5 die. I'm sizing my 1x fired cases now. No problems. Shoulder bump set using Alex Wheeler's video as a guide. Using the comparator Harrell's provides, I'm bumping from 1. 2085" to 1.2065". As best as I can tell, I'm reducing the 0.200" line from 0.4726" to 0.4712". Now I recognize the diameters I'm reporting are greater than the supposed reamer spec but that's what I'm measuring with my mic. Could be bad technique, bad tool or bad reamer. Doesn't matter at this point.

My first firing was with a pretty mild load of 31.6 gr Varget. I clocked 2860 fps from my 30" barrel. Velocity was a little lower than I was expecting but this is a new rifle/barrel. I'm already seeing evidence that the barrel is speeding up on it its own.

Will report additional results after 2nd firing.

 

[Alex Wheeler]

I have cases out of my chamber. .462" at the shoulder .471" above the extractor groove. After sizing in the D4 .460" shoulder and .470" above the extractor groove. For me, I consider that ideal. I spec my dasher reamers .462" at the shoulder and .4714" at .2"

 

[Cool Tool]

I've had enough time to put 8 firings on one of the shiraz norma cases. I would now say it is fully formed, and we can trust the measurements. I have a couple things to point out. First off, the reamer and chamber measure exactly .4714" at the .200. I would also point out that I never "eased" the brass into use. I started it on full house h4895 loads, a known primer pocket wrecker!

Fired case measures .4711", sized case is .4696". This case has been maintained by sizing on a d4 since the beginning. As for comparison, a worked lapua case measures .4711" fired, but .4705" sized using the same die and chamber. My observation here is that the norma which started life smaller by .001", must be resisting the sizing less. Remember when I said we will be learning as we go with the new brass?

Now as for the primer pocket tightness/toughness. My sample case is as tight or tighter than lapua of equal treatment.

Tom

Tight yes but equal to lapua on tightness no I don't by that part ,good yes but I wont give it being as tight as lapua.

 

[Cool Tool]

George,

I plan on firing it until it dies, time will tell. What I see so far, and I guess my point, I wouldn't let THAT be the determining factor. I've had lapua cases get retired because I felt the primer went in to easy around 13 reloads. I will keep slamming that case with h4895 and see when it dies.

Well good luck at the nationals an take sunscreen you might get a good tan while your down there have a safe trip.

 

[ASbobcat]

Does anyone have a measurement of actual powder capacity to base of neck in the new Norma Dasher brass?
Just curious, thanks.

 

[halo68]

6mm Dasher
You guy's are sure making it look difficult to reload for the 6mm Dasher.

 

[pburr]

6mm Dasher
You guy's are sure making it look difficult to reload for the 6mm Dasher.

Hahaha......this made my day! Reinventing the wheel is a labor of love for some folks but yea, I'll stick to my old fashioned Lapua for a while longer

 

[ASbobcat]

Hahaha......this made my day! Reinventing the wheel is a labor of love for some folks but yea, I'll stick to my old fashioned Lapua for a while longer

+1 for Lapua

 

[ASbobcat]

Does anyone have a measurement of actual powder capacity to base of neck in the new Norma Dasher brass?
Just curious, thanks.

In the absence of replies I will answer my own question.

It has been reported in a separate thread that a (long) bullet was "sitting on the powder" at 34.2 gr of Varget. Allowing for use of a possibly shorter bullet, it appears that the case capacity of the new Norma Dasher brass to the neck/shoulder junction is approximately 35gr. This is the same capacity as a standard Lapua 6BR case (non-Dasher) within the margin of error (+/-1gr). The capacity of a fire formed Lapua case in a Dasher chamber is approximately 38.0-38.5gr.

So, it would appear that the longer neck has been offset by less case capacity.

I would welcome inputs if someone has a different measure of actual powder capacity.

 

[dedeadeye]

To date it is LAPUA for me. Roger