Frustrated making Dasher brass

[Johndenverut]

How mad am I going to be here? I thought I had read a great deal before doing this, but I am stumped. I decided to try the false shoulder method with a 6.5mm expander in order bump my necks out. Tonight I tried to load my first rounds and my new Forster benchrest seater die wont bring the necks back with enough tension to hold the bullet tight at all or chamber it in a no neck turn barrel. The seater moves within the die and bottoms out in the press without putting any neck tension on the case.

Basically, I have a lot of Lapua 6mm BR brass with 6.5mm necks which wont size down with my bench rest die. Am I doing something wrong or do I need to spend another 80$ on the correct die to bring the necks back in spec?

 

[CanusLatransSnpr]

Did you take and run the brass through your full length die prior to attempting to seat bullets? How is a benchrest seater die going to size down necks? I'm confused with what you have stated already!

Mike

 

[rain164845]

You will need some sort of sizing die to bring the neck down enough to grip the bullet. A seating die will not do this in most cases.

 

[shooter63]

to get a false shoulder in the nk. you need to nk. size it down the nk. till you have a small amount of resistance upon closing bolt /use plenty of lube on the lugs / but keep out of chamber /also you need about 3th. nk tension /redding bushing die works for me / also get all that lube you used on your 6.5 ex mandrel out of those cases before trying to load its not bad after a few / regards shooter63

 

[Johndenverut]

I'm an idiot. Thanks for the help. I got so frustrated that I couldn't see myself out of the problem. I used the sizing die and now have the false shoulder. Thanks again.

 

[Charles]

This is what makes this a great site.

 

[bozo699]

I'm an idiot. Thanks for the help. I got so frustrated that I couldn't see myself out of the problem. I used the sizing die and now have the false shoulder. Thanks again.

No sir,.....not a idiot!!! a idiot would have kept struggling with it, a smart man would ask for help in the right places,......you did that! only a idiot would continue in uncharted territory and took a chance of ruining his brass or worse hurting himself or even worse,....others!

Charles,
Your spot on my friend.
Wayne.

 

[22BRGUY]

Also with the false shoulder I still like to seat the bullets out 20 or 30 thou and jam them also to help stop case movement forward during firing forming. Just an added thing that works well for me.

You are not an idiot at all sir...just going through what we all do in the beginning of a new project. As said before, there are many here with tons of helpful experience that just truly want to help others.

Best Wishes

 

[bozo699]

Also with the false shoulder I still like to seat the bullets out 20 or 30 thou and jam them also to help stop case movement forward during firing forming. Just an added thing that works well for me.

You are not an idiot at all sir...just going through what we all do in the beginning of a new project. As said before, there are many here with tons of helpful experience that just truly want to help others.

Best Wishes

22BRGUY,
I thought of mentioning that but opted not to but that is the way I do it also when using a false shoulder, I also use a lot of neck tension and seat long for added support.
Wayne.

 

[Johndenverut]

Thanks for the help again guys. Now I'm realizing that using RL 17 in a Dasher is not good either for 105 grain bullets. Now I'm trying to trade 17 for 15 unless you guys have experience with that too. It would be my fireforming and shooting powder with the 105's if anyone has any ideas. Thanks again; this is a lot harder than the Grendel I shoot.

 

[johara1]

When you FF. be sure you clean and dry your chamber,remove all lube from the cases also. Start with one and load it and fire it and see how long the case is, then adjust your load to make them longer. I was using Varget, 31- 32 gr. went from 1.541 to 1.555, settled in on 31.8. I was using a 108 berger bullet, and i anneal before i fire form. I made 50 the other day and lost one to a split shoulder...... jim

 

[boiler_house7]

I know I'm doing what Mr O'hara schooled me on as stated above and it works for me. Thanks Jim

 

[CaptainMal]

Interesting.

Had a similar conversation with a guy making Dasher cases at the range yesterday. He was getting mis-fires quite often with the false-shoulder method. When it worked it worked. I think he just did not have that "false shoulder" in the right place to really hold the case head against the bolt face.

Anyhow, I make Dasher all the time. Never had an issue. JAM.

JAM, JAM, JAM...you wanna' do a false shoulder and jam? Go ahead. The key is to JAM for me. I don't mess with the false shoulder. Jamming jams.

Simple as that.

 

[Hal]

When you FF. be sure you clean and dry your chamber,remove all lube from the cases also. Start with one and load it and fire it and see how long the case is, then adjust your load to make them longer. I was using Varget, 31- 32 gr. went from 1.541 to 1.555, settled in on 31.8. I was using a 108 berger bullet, and i anneal before i fire form. I made 50 the other day and lost one to a split shoulder...... jim

Jim

Thanks for the tip on adjusting the powder to adjust the finished case length.

A question about drying the chamber when fire forming.

I thought I read somewhere that some guys lightly lube the cases when fire forming and some guys want a dry chamber . Any idea why.

Hal

 

[johara1]

Hal, Blow length is the first step in making an accurate round. Lube on a case makes them shorter, when you get set up blow length should be with in a couple of thousands. I turn necks and where i stop the cutter is my shoulder,plus a .020 jam..... jim

 

[Judd]

Just out of curiosity...can you use previously fired BR brass? I thought no because the necks have been turned for the BR so you probably want new brass???

 

[CanusLatransSnpr]

Just out of curiosity...can you use previously fired BR brass? I thought no because the necks have been turned for the BR so you probably want new brass???

Depends on what neck diameter you're using?

Mike

 

[Judd]

I was really speaking generally. For me I always just skim neck turn just to take off the high points and use a no neck turn chamber.

 

[johara1]

I use a .266 neck, for a total clean up and even neck tension....... jim

 

[jrm850]

For those of you Jamming and shooting with Blue Box Lapua, what neck bushing are you using? My smallest bushing is a .266 but it seems wee bit loose for the job.