So, do donuts matter... IF ?

[chop house]

one only shoots short bullets seated out far enogh to avoid them?

 

[nmkid]

What I have read is that it doesn't matter as long as your bullet is seated short of the doughnut.

 

[260 Ravage]

What I have read is that it doesn't matter as long as your bullet is seated short of the doughnut.

I agree. Keep the bullet ahead of that neck/shoulder junction. I believe donuts can form ,then, but not effect accuracy.

 

[XTR]

I'm fine with most of them, not particularly fond of the Dunkin' variety, more of a Krispy Kreme guy.

I think they are only a problem if you seat deep enough to contact it with the bearing surface.

 

[JBT47]

Not a fan of Dunkin either.

I don’t worry about donuts as I seat all my bullets out far enough to avoid contact.

 

[fguffey]

do donuts matter...

Depends, most do-nuts are caused by bad habits. There is something about donuts reloaders do not understand. I have formed donuts long before I fire the case, I have formed cases with no intentions of loading and firing, my sole purpose of forming those cases was to determine the length of the chamber from the shoulder of the chamber to the bolt face. By the time I formed the 30/06 cases down to 243 on my way to forming 22 Remington Wildcats the neck was almost closed off.

And then there are donuts that form donuts when fired, some reloaders push the donut in some push the donut out, again, there is something about donuts reloaders do not understand.

F. Guffey

 

[fguffey]

I think they are only a problem if you seat deep enough to contact it with the bearing surface.

Reloaders have given themselves an exemption; I do not want to cause a restriction in the neck of the case because the inside diameter of the neck controls gas escape.

F. Guffey

 

[Dgd6mm]

NO, NO, NO if you seat in front of them.

 

[jcampbellsmith]

I worry about donuts. They form when I resize the brass. I neck turn to try and relieve the situation. Regards JCS

 

[LHSmith]

Reloaders have given themselves an exemption; I do not want to cause a restriction in the neck of the case because the inside diameter of the neck controls gas escape.

F. Guffey

Decades old theory........prove that the subtle restriction imparted by a formed donut in reasonable case forming (6 mm to 30 or .224 to 6mm) affects accuracy due to impeding the gas flow at the neck. And don't quote some manufacturer(s) who use this unproven theory as part of their advertizing.

 

[M-61]

And then there are donuts that form donuts when fired, some reloaders push the donut in some push the donut out, again, there is something about donuts reloaders do not understand.

Why not share with us the part that reloaders do not understand?

 

[T-shooter]

It seems like with full length resizing, the more the shoulder is set back, the more brass with be forced into the shoulder and neck. Without a resizing ball to reform the inside of the neck, you'll get a donut in that area.

 

[GSPV]

Seat in front of the donut and never worry about it.

 

[KMart]

It seems like with full length resizing, the more the shoulder is set back, the more brass with be forced into the shoulder and neck. Without a resizing ball to reform the inside of the neck, you'll get a donut in that area.

You will still get the donut when using the expander ball. The expander ball is a couple of thousandths smaller than bullet diameter. The bullet still wants to stop there, if the base of the bullet goes deeper into the case.

 

[mikecr]

Donuts also matter if you FL size your necks.
This, because you bring donut brass into neck tension.

 

[Mikemci]

I'm fairly new to this forum, but what is F.Guffy's deal? Is there a way to put someone on "ignore"?

 

[Terry Altom]

I'm fairly new to this forum, but what is F.Guffy's deal? Is there a way to put someone on "ignore"?

Just click on a user's name and then click on ignore.

 

[Milo 2.0]

I'm fairly new to this forum, but what is F.Guffy's deal? Is there a way to put someone on "ignore"?

Just tell him you're the foremost expert on bumping shoulders on brass.

 

[Grimstod]

If you can load beyond the doughnut then they are less of an issue. Somecartridges like the PPC almost always areloaded beyond the doughnut. Mike Rattigan says its why the PPc is so accurate. Tye 6.5x47 can be given the same credit for its inhearant accuracy.

By the way some call it "the dreaded doughnut" and for good reason. It can be a nightmare.

 

[KenOath]

I only shoot 6br/BRA and straight 284, as recommended to me at the outset of putting my rifles together is to have enough freebore to keep bearing surface of bullet above donut area. The donut hasn’t been an issue and the 284 has noticable donuts.