Time to make the donuts....

[AlNyhus]

Al......With the .925 jacket. What is your final overall finished length ??

Right at .912 with the Robinett die.

 

[David Conder]

Al what is your core swedge length on the .925. Just wondering how you that short of length on point up. Thanks

 

[jackieschmidt]

Al what is your core swedge length on the .925. Just wondering how you that short of length on point up. Thanks

David, just for your information, this is my master core seat and pointed up bullet that I strive to duplicate.
All of my jackets are .925, and I think my ogive is closer to 7 3/4 than 7 1/2.

 

[David Conder]

My bullets come out base to point longer than that I have some Ronnie Cheek bullets a the are longer then mine base to tip mine are .931 Cheeks are .940 ish
My core seated jackets are 914 ish tell me what you think my dies are Ulrich 7

 

[jackieschmidt]

I think Ronnie advertised his bullet as a 7 3/4, but when comparing them to bullets such as Randy’s 112, I think they were closer to 8.

Jim Moore has Ronnie’s 30 caliber Dies that he made his 112’s on,

 

[AlNyhus]

My core seated jackets are 914 ish tell me what you think my dies are Ulrich 7

David, how are you determining your core seating pressure?

 

[David Conder]

I seat till I the base diameter comes 3081 an just before jacket stretch at the lead line thanks Al like to know about what you think

 

[liseo]

Guys, how do you determine the exact inner diameter of the die(core seating and/or point up) ?
Could pressing a piece of pure lead be a way?

 

[D Coots]

Most likely if you "pop" a jacket when core seating, that's the largest diameter.

 

[jackieschmidt]

Guys, how do you determine the exact inner diameter of the die(core seating and/or point up) ?
Could pressing a piece of pure lead be a way?

The Die ID is determined by the Die Maker, and is what it is.

Now, how much lube, and how much core seat pressure you give determines the size of the core seated jacket.

A while back, I found out I was stretching the jacket a little too much. So, I modified my core seat to where with a VERY SMALL amount of lube, the core seated jacket was coming out with a certain “feel” out of the Die. This happens to also be really close to the exact same size as the pointed up bullet with the amount of lube I use during the point up, resulting in the best bullets we have made, judging by mine and Ed's success in Matches.

I tried that “point up” thing where the core seated jacket is smaller than the pointed up bullet, the bullets shot like cr-p. I also tried the lubed core thing with the 30’s, as it worked really great with my 6mm 68 grn BT. The 30’s shot terrible.

I really believe every bullet maker kinda develops his own ideas after a while. You get a set of Dies that are top notch, garner as much info as you can from some of the real masters, and then be willing to try a few of your own ideas.

Trial and error in the process of the bullet making, and confirmation at the range is what I have settled in too.

 

[AlNyhus]

Guys, how do you determine the exact inner diameter of the die(core seating and/or point up) ?
Could pressing a piece of pure lead be a way?

Never tried lead...might work. I seat a core with very light light pressure and measure the jacket O.D. Then repeat with more core seating pressure. And again. At some point, the jacket diameter will stabilize at certain diameter no matter how much seating pressure is used.

Intentionally popping a jacket works too. Have a roll or three of Charmin handy.

 

[liseo]

Do different hardnesses and thicknesses of the jackets ( same caliber and length, different brand) interfere with the pressure required for the core-seated bullet to perfectly copy the die profile? I'm referring mainly to the case of boat tail bullets.

Do you treat them differently?

Regarding popping a jacket, I've done that too, although unintentionally...

 

[David Conder]

I have a set of detach double o jive dies an those bullets constantly shoot small1
An o I have 9 set of dies 6an22 all dies make very good bullets but I am trying
To get a handle on these 30 die set that is why I asking for information from you
bullet makers the question Thanks for your input