Dasher forming question

[savageshooter86]

So why expand up, then neck turn at that size, then create false shoulder with bushing? Vs turning at 6br, then expanding up, then creating false shoulder with bushing?

Assuming going .25 cal or 6.5 to expand to create false shoulder

Thanks

 

[7stubby]

I turn before I neck up to make the false shoulder. I only turn to just a bit past where the new shoulder would end of being. This way to eliminate any possibility of a donut forming.
Others will have their way. You just need to find what works best for you.

 

[ShootDots]

So why expand up, then neck turn at that size, then create false shoulder with bushing? Vs turning at 6br, then expanding up, then creating false shoulder with bushing?

Assuming going .25 cal or 6.5 to expand to create false shoulder

Thanks

When you "neck-up" at least 1/2mm as to 6.5mm you REALLY push ALL the imperfections from the INSIDE of the neck walls to the OUTSIDE of the neck walls and turn off those imperfections. Now you have as uniform neck wall thickness as you can reasonably get.. That is why I do it that way. Actually, now-a-days, I have DJ's Brass Service do all that and Hydroform. Easy and literally no more expensive than doing your own fireforming, once components and barrel wear is taken into consideration..

 

[Jason Boersma]

Just make it easier on your self, neck turn then jam way into the lands and shoot. Easy

 

[savageshooter86]

Just make it easier on your self, neck turn then jam way into the lands and shoot. Easy

I thought about that option too. I'm new to the Dashers. And I know there are several ways.

 

[Dusty Stevens]

Just make it easier on your self, neck turn then jam way into the lands and shoot. Easy

+1

 

[falconpilot]

Just make it easier on your self, neck turn then jam way into the lands and shoot. Easy

Yelp....

 

[Terry Altom]

Just make it easier on your self, neck turn then jam way into the lands and shoot. Easy

This is how I'm forming for my new Dasher.

 

[johara1]

Sounds good, but if you stretch the case at the base it is junk…. jim

 

[Jason Boersma]

Use a lot of neck tension. I've only lost 1 case in 3 years

 

[savageshooter86]

DJ'S

Sounds good, but if you stretch the case at the base it is junk…. jim

This from the load and jam method?

 

[johara1]

Use a lot of neck tension. I've only lost 1 case in 3 years

i guess if you do them right they will last three years plus….. jim

 

[johara1]

long seat and a shoulder and a soft primer and a dry, clean chamber and case. They will blow to 1.550…jim

 

[Joe Salt]

Jim I just done about 50 rounds by just turning the necks then run them in my bushing die with a 260 bushing loaded them with 450 primers 34 gr. of R-15 and 90 gr. bullets jammed they came out 3 thou. longer than with the false shoulder. So I will keep an eye on the web.

Joe Salt

 

[johara1]

Jim I just done about 50 rounds by just turning the necks then run them in my bushing die with a 260 bushing loaded them with 450 primers 34 gr. of R-15 and 90 gr. bullets jammed they came out 3 thou. longer than with the false shoulder. So I will keep an eye on the web.

Joe Salt

Joe if you turn necks use where you stop the turner as a shoulder it will hold the case back along with a long seated bullet about .020. Never use a 450 primer for fire forming, use a federal jim

 

[shoot4fun]

Maybe I am doing it all wrong.
I don't fire-form in my match barrel. I have an old barrel from my PPC days that was chambered with the same reamer as my match barrel. If I didn't have this I would surely get DJ to Hydroform for me. I've seen the operation first-hand and he does great work.
My 6BR brass goes thru the 6.5 expander die first. Then, using a Redding 6BR Competition Neck Die and a .266 bushing i carefully set up until I get stiff but reliable bolt close on the false shoulder.
After getting the false shoulders done I have my Stiller neck turner set to turn down into the false shoulder to eliminate future donuts.
At this point I load them with any old 6mm bullets I have laying around and some powder I don't really use much for fire-forming. I've never lost a piece of brass doing this but I've lost some blue box brass. They cracked where the old juncture of neck-shoulder was. Apparently it was a poor lot of brass (even Lapua has them).
Once they are fire-formed I always anneal with the Bench-Source and trim with the Giraud.

 

[Mulligan]

Jim I just done about 50 rounds by just turning the necks then run them in my bushing die with a 260 bushing loaded them with 450 primers 34 gr. of R-15 and 90 gr. bullets jammed they came out 3 thou. longer than with the false shoulder. So I will keep an eye on the web.

Joe Salt

Isn't 34gr a bit "Spicy" for a fire form load?
CW

 

[DennisH]

Jim I just done about 50 rounds by just turning the necks then run them in my bushing die with a 260 bushing loaded them with 450 primers 34 gr. of R-15 and 90 gr. bullets jammed they came out 3 thou. longer than with the false shoulder. So I will keep an eye on the web.

Joe Salt

How much are you taking off the necks?

 

[Joe Salt]

How much are you taking off the necks?

Isn't 34gr a bit "Spicy" for a fire form load?
CW


The necks are 266 and I'm taking the necks to 10 thou.The loaded round is 263!

No the 34 Gr. is fine in mine with a 90 grain bullet. That is something else I have talked to people about is that I believe the straighter your Chamber is the hotter the load you can use. I also have 300 WSM's that I can shot loads that some can't get close too.

Joe Salt

 

[wzee]

long seat and a shoulder and a soft primer and a dry, clean chamber and case. They will blow to 1.550…jim

I have never had dasher brass come out to 1.550 mine are in the 1.538.i must be doing something wrong