Time to make the donuts....
- Thread starter AlNyhus
- Start date
Hi Dave. Thanks for responding. My jackets are measuring .007 longer after core seat. As far as diameter goes, here are the dimensions at the base and at the lead line after core seat.
Attachments
Tim Singleton
Gold $$ Contributor
Dave
Please Expound on the jacket stretch you mention. I think you are referring to diameter at lead line
.?
Jim
I think the overall length growth change you are talking about comes from the angle and length oh the boat tail
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D Coots
Silver $$ Contributor
Jim
I'd say if you have .007 stretch, the lead is completely filled out.
You may be a bit too low where you measured your LL measurement??
My Peinhardt dies like the base and LL to be the same. George's seem to like the LL a bit smaller than the base.
One size doesn't fit all.
Tim
I always measure the jacket before and after core seating. The same jacket. I believe that is something to track for repetition when using the same lot of jackets that are working
Just the way I do it. Lately not doing it too well at that. Back to square 1 with my program.
Later
Dave
I'd say if you have .007 stretch, the lead is completely filled out.
You may be a bit too low where you measured your LL measurement??
My Peinhardt dies like the base and LL to be the same. George's seem to like the LL a bit smaller than the base.
One size doesn't fit all.
Tim
I always measure the jacket before and after core seating. The same jacket. I believe that is something to track for repetition when using the same lot of jackets that are working
Just the way I do it. Lately not doing it too well at that. Back to square 1 with my program.
Later
Dave
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jackieschmidt
Gold $$ Contributor
I arrive at what’s best at the range.
Ed and I have experimented with different core seat, different point up length, different lube, etc. we finally arrived at what’s best we use now with our 112 30 caliber.
I know exactly what diameter and length I want the core seated jacket to be, and the exact length from base to ogive for the point up. We weigh the lube out in .1 grain with the exact number of bullets every time.
We are also diligent in keeping any build up on the core punch from happening.
The target tells me if what we are doing is correct.
Ed and I have experimented with different core seat, different point up length, different lube, etc. we finally arrived at what’s best we use now with our 112 30 caliber.
I know exactly what diameter and length I want the core seated jacket to be, and the exact length from base to ogive for the point up. We weigh the lube out in .1 grain with the exact number of bullets every time.
We are also diligent in keeping any build up on the core punch from happening.
The target tells me if what we are doing is correct.
Jackie share some numbers an your recipe Thanks
Larry Koch
Silver $$ Contributor
How long do you wait between core seating and point up? 24 hours or 48 hours or more. 24 hours seems good on 6mm, but longer on 30's.
jackieschmidt
Gold $$ Contributor
The numbers are based on measuring everything.
I am using a core seat pressure that produces a core seated jacket that is exactly the same size as my finished bullet. We tried the “point up” thing where the core seated jacket is actually a tad smaller, the bullets did not shoot as well.
When we make bullets, I measure the core seated jacket diameter to the “tenth”. I already know what the point up die produces with the specific amount of lube. So this is really easy to control.
As I said in one post, I am a stickler when it comes to build up on the core seati punch, so I made a little hardenned ring that we slip over the punch every so often and it scrapes even the slightest buildup that you can’t even see off the punch. This allows for a very close fitting punch.
I know that most say it doesn’t make any difference, I feel like it it is something you can do something about, why not do it.
I have also arrived at what I believe is the ideal point up length. I have a little ogive tool that allows us to keep this consistent from bullet to bullet.
I am always open to ideas, and read just about anything thing any body has to say. And I do try things.
But in the end, the target has the final say. Since he is retired, Ed has a lot more time at the range than I do. And since we shoot exactly the same set up, he can give us a lot more data as to what is really going on.
I am using a core seat pressure that produces a core seated jacket that is exactly the same size as my finished bullet. We tried the “point up” thing where the core seated jacket is actually a tad smaller, the bullets did not shoot as well.
When we make bullets, I measure the core seated jacket diameter to the “tenth”. I already know what the point up die produces with the specific amount of lube. So this is really easy to control.
As I said in one post, I am a stickler when it comes to build up on the core seati punch, so I made a little hardenned ring that we slip over the punch every so often and it scrapes even the slightest buildup that you can’t even see off the punch. This allows for a very close fitting punch.
I know that most say it doesn’t make any difference, I feel like it it is something you can do something about, why not do it.
I have also arrived at what I believe is the ideal point up length. I have a little ogive tool that allows us to keep this consistent from bullet to bullet.
I am always open to ideas, and read just about anything thing any body has to say. And I do try things.
But in the end, the target has the final say. Since he is retired, Ed has a lot more time at the range than I do. And since we shoot exactly the same set up, he can give us a lot more data as to what is really going on.
jackieschmidt
Gold $$ Contributor
At least 24 hours.
Jackie what is your base to point overall length I have bought a 4 die set of Ulrich
30 from Michael Turner that is why I ask I have made 6s a long time the 30 are a different set up. Thanks for the help
I have a 10x lighted loupe and the darn thing eats through batteries too fast. Do you have a link to that microscope? Thanks.
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21PHX
Silver $$ Contributor
Works good, don’t it??? Coming to the Shamrock in March?
bichettereds
Silver $$ Contributor
Pop!!Well seated core.
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