Time to make the donuts....
- Thread starter AlNyhus
- Start date
Al what is your core swedge length on the .925. Just wondering how you that short of length on point up. Thanks
jackieschmidt
Gold $$ Contributor
David, just for your information, this is my master core seat and pointed up bullet that I strive to duplicate.
All of my jackets are .925, and I think my ogive is closer to 7 3/4 than 7 1/2.
My bullets come out base to point longer than that I have some Ronnie Cheek bullets a the are longer then mine base to tip mine are .931 Cheeks are .940 ish
My core seated jackets are 914 ish tell me what you think my dies are Ulrich 7
My core seated jackets are 914 ish tell me what you think my dies are Ulrich 7
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jackieschmidt
Gold $$ Contributor
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,
Jim Moore has Ronnie’s 30 caliber Dies that he made his 112’s on,
AlNyhus
Silver $$ Contributor
David, how are you determining your core seating pressure?
I seat till I the base diameter comes 3081 an just before jacket stretch at the lead line thanks Al like to know about what you think
jackieschmidt
Gold $$ Contributor
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
Silver $$ Contributor
Never tried lead...might work. I seat a core with very light light pressure and measure the jacket O.D. Then repeat with more core seating pressure. And again. At some point, the jacket diameter will stabilize at certain diameter no matter how much seating pressure is used.
Intentionally popping a jacket works too. Have a roll or three of Charmin handy.
liseo
Silver $$ Contributor
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...
Do you treat them differently?
Regarding popping a jacket, I've done that too, although unintentionally...
Attachments
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
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
I've got a set of George's 8 ogive 30 dies.
I currently had been making a 117.5 gr. bullets but decided to make a 108 gr. for a 30 PPC I just had chambered up.
Testing last weekend on the 108s it was clear the bullets just weren't where I wanted them to be. I changed the point up dies for the lighter bullets and thought I'd point up a few of the 117.5s at that setting just to test and see if closing up the meplat a little more would make any difference,
these were .0010 shorter on the bto than what I had been making before.
I had originally felt that the 117's had shot really good but after testing the new bto length they shot unbelievably better.
Lesson learned keep testing even when you think you've got it right.
I currently had been making a 117.5 gr. bullets but decided to make a 108 gr. for a 30 PPC I just had chambered up.
Testing last weekend on the 108s it was clear the bullets just weren't where I wanted them to be. I changed the point up dies for the lighter bullets and thought I'd point up a few of the 117.5s at that setting just to test and see if closing up the meplat a little more would make any difference,
these were .0010 shorter on the bto than what I had been making before.
I had originally felt that the 117's had shot really good but after testing the new bto length they shot unbelievably better.
Lesson learned keep testing even when you think you've got it right.
AlNyhus
Silver $$ Contributor
When I started making bullets in the early 2000's, Guy Chism gave me several pieces of good advice, including this tidbit that may or may not be helpful to anyone else.
Put a small drill bit in the bullet and mark when it contacts the core. Measure that and record it. Then do the same thing with a core seated jacket. Now you know how much the front of the core flows forward during pointing in that particular point die. If you make your own cores, you can shorten/lengthen the cores to find where the finished bullets don't shoot as well. In between is what he called the 'sweet spot' of that point die.
You can also figure both as a percentage of jacket fill, if that's your cup of tea.
Guy was a really smart, common sense person.
Put a small drill bit in the bullet and mark when it contacts the core. Measure that and record it. Then do the same thing with a core seated jacket. Now you know how much the front of the core flows forward during pointing in that particular point die. If you make your own cores, you can shorten/lengthen the cores to find where the finished bullets don't shoot as well. In between is what he called the 'sweet spot' of that point die.
You can also figure both as a percentage of jacket fill, if that's your cup of tea.
Guy was a really smart, common sense person.
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jackieschmidt
Gold $$ Contributor
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