Die that seats off ogive

[muleman69]

Do they make a die that will seat off ogive of specific caliber or is this the wrong thing to do? Wouldn't this be a faster way of coming up with your OAL especially when using a micrometer seating die? Or is it apples to apples

 

[243winxb]

SAAMI-
OGIVE
The curved portion of a bullet forward of the bearing surface.

If measured from the point when the bearing surface starts into the ogive, there will be a lot of variation with different bullet when measuring the OAL.

The same head to ogive setting may produce ammo to long for a magazine, with some VLD type bullets.

Do they make a die that will seat off ogive of specific caliber

I think the Redding comp die does?

the Seating Stem have been honed and ground to virtually the same diameter as a jacketed bullet.

http://www.redding-reloading.com/tech-line-a-tips-faqs/168-working-with-your-competition-seating-die

I don't have one. So a guess on my part.

 

[Richard Coody]

i believe a better question would be "what seating die doesn't seat by contacting the bullet somewhere along the ogive".

 

[243winxb]

Seating stems should all contact the ogive with a rifle bullet. You dont want the nose of the bullet making contact with the seating stem first.

But lower, at bullet diameter may work the best for all bullets??

I see Redding makes special ones for VLD.

 

[Ledd Slinger]

All seating dies contact the ogive. But there are some that offer much greater surface area contact on the ogive. 21st century makes one.
http://www.xxicsi.com/calibrated-bullet-seater.html

I just started bedding my seater stems with JB Weld for the bullet I am using. Much cheaper than the 21st century option. If I want to change bullets in the cartridge, I simply drill out the JB and re-bed the stem on the new bullet. Drill out the center with a 1/8" drill bit after bedding so bullet tip does not make contact.

 

[Tim s]

Even if you could, what happens with lighter/heavier bullets of different lenghts?
Only one consistant way to do it is find touch lenght and adjust accordingly.....pretty simple.

 

[Bart B.]

Only one consistant way to do it is find touch lenght and adjust accordingly.....pretty simple.

Yes.

No seater I know of has its bullet contact point a diameter about .002" to .003" less than the barrel groove diameter where bullets first touch the rifling. Grooves are about .004" deep. This is the best place so adjusting seater settings are easy to adjust for a given result. Steeper throat angles let contact happen about 001" smaller, less shoulder angles contact bullets about that much larger diameters.

Readers would benefit with a sliding donut with outside diameter .001" smaller than bullet chamber. Their hole about 40% of bullet diameter. This would align bullets on straight case neck axis as they rested on case mouths close to their tip.

A floating bullet chamber with a shoulder to center case shoulders would benefit loaded cartridge straightness. Forster has this.

Blacken a bullet , seat one extra long then chamber it. Eject the round them mic its contact diameter. It will change a little from throat erosion

 

[NorCalMikie]

Modify any seater stem to contact the ogive by drilling the hole deeper so the tip doesn't contact the bottom of the hole.

 

[muleman69]

All seating dies contact the ogive. But there are some that offer much greater surface area contact on the ogive. 21st century makes one.
http://www.xxicsi.com/calibrated-bullet-seater.html

I just started bedding my seater stems with JB Weld for the bullet I am using. Much cheaper than the 21st century option. If I want to change bullets in the cartridge, I simply drill out the JB and re-bed the stem on the new bullet. Drill out the center with a 1/8" drill bit after bedding so bullet tip does not make contact.

I would like to no more about how you do this.

 

[ireload2]

The seater would need to be the same exact shape as the origin of your rifling to give results that correspond to your barrel.
Each brand and bullet nose design will contact at different locations. If the bullet is a mass produced bullet there will be more than one point forming die so there will be slight differences in the bullets that come out of the same box.

 

[Bart B.]

All seating dies contact the ogive. But there are some that offer much greater surface area contact on the ogive. 21st century makes one.

21st Century claim:

"Notice how the bullet is contained in the seater stem. There is about 1/4" of ojive contact, making it possible to hold overall length to 1/2 thousands, .0005. Also helping to keep bullet in line with case."

Across all lots of a given bullet? Their tips vary that much and more from any point on the ogive in a given lot. Few lots of bullets are made with the same ogive pointing die shape.

Can dies be made that hold such tolerances on bullets they profile and point?

 

[Dusty Stevens]

Yes.

No seater I know of has its bullet contact point a diameter about .002" to .003" less than the barrel groove diameter where bullets first touch the rifling.

if youll look at the newlon website at the picture of the plain seating die. that picture shows how their blanks (the regular and micrometer) and we make those contact any point on the bullet we want. if you want it at .006 under bullet dia thats no problem. been doing this for many years. something like a wilson style or really any other style contacts the bullet way too far out where even custom bullets cant be held tight much less semi custom or commercial bullets. most problems have simple solutions if you ask around to the folks that are movers and shakers in the accuracy world.

 

[avidflyer]

if youll look at the newlon website at the picture of the plain seating die. that picture shows how their blanks (the regular and micrometer) and we make those contact any point on the bullet we want. if you want it at .006 under bullet dia thats no problem. been doing this for many years. something like a wilson style or really any other style contacts the bullet way too far out where even custom bullets cant be held tight much less semi custom or commercial bullets. most problems have simple solutions if you ask around to the folks that are movers and shakers in the accuracy world.

Does the seating die need to be hardened after reaming like a sizing die?

 

[Dusty Stevens]

Does the seating die need to be hardened after reaming like a sizing die?

yes it does very much so. and you need to get the resize reamer made when you get the chamber reamer made for best fit. if you dont harden the dies they become sticky.

 

[Bart B.]

If the bullet is a mass produced bullet there will be more than one point forming die so there will be slight differences in the bullets that come out of the same box.

All of a given lot of Sierra's bullets are made with the same dies, lead core and jacket material. Same for Berger and Hornady.

There are small tolerances in each lot mainly due to tiny metal properties' variables in jacket material.

 

[Bart B.]

="Dusty Stevens, post: 37169080, member: 1292055"IIf youll look at the newlon website at the picture of the plain seating die. that picture shows how their blanks (the regular and micrometer) and we make those contact any point on the bullet we want.

Thanks for enlightening me.

 

[ranger3]

Hornady makes specific seater stems for vld and for hunting bullets

 

[avidflyer]

All of a given lot of Sierra's bullets are made with the same dies, lead core and jacket material. Same for Berger and Hornady.

There are small tolerances in each lot mainly due to tiny metal properties' variables in jacket material.

I was told by berger that the main variations in a bullet are due to the die wear. Lot sare changed when dies are changed

 

[DCRYDER]

Better get your barrels changed out quick

I don't understand this comment. Most 6mm barrels are .237"/.243" (bore/grooves) so thats .003" deep grooves, 6.5mm are .257"/.264" that's .0035" deep, and .30cal is .300"/.308" for .004" depth.

 

[chop house]

All seating dies contact the ogive. But there are some that offer much greater surface area contact on the ogive. 21st century makes one.
http://www.xxicsi.com/calibrated-bullet-seater.html

I just started bedding my seater stems with JB Weld for the bullet I am using. Much cheaper than the 21st century option. If I want to change bullets in the cartridge, I simply drill out the JB and re-bed the stem on the new bullet. Drill out the center with a 1/8" drill bit after bedding so bullet tip does not make contact.

i can see the value in this, but am trying to understand how you get perfect concentricity of bullet to stem when setting the JB. with wilson type seaters where the stem doesn't float misalignment in the bedding process seems it would affect loaded round runout? have you tested/measured this, either directly on cartridges or on the target? thanks