sizing bullets

[dgr416]

I have a 333 okh belted mag rifle that I want to size some 338 bullets for .I talked to redding at the NRA show they said if I sized them down twice I.could do it with a regular reloading.press instead of having.to buy an expensive H press and buy one .I am not sure what kind or size sizer to buy .You have to make a ram to push them through the die .I.wish I.knew someone who know how to do this .I know that you can't use bonded bullets but you.can use partitions and regular bullets .I.want to do about a 1000 that should last a lifetime for me !

 

[Bullet bumper]

Sizing down a jacketed bullet is a bad idea and can leave the core loose inside the jacket . Jacketed bullets are made on the swage up principle . Redding does not know what they are taking about if referring to standard jacketed bullets . Solid monolithic bullets can be sized down ok but it takes a lot of pressure to do it and normal ring die would probably break . A heavy duty ring die would be required and Possibly a hydraulic press depending on how much reduction is required the short stroke required for a bullet may be possible on a big O frame compound leverage press . .005 does not sound much but on a solid bullet it takes a fair bit of pressure .
If a jacketed bullet is core bonded then sizing down is more viable as the bonding may keep the jacket and core attached but there is no guarantee . If the bullets are spire points or Ballistic tips then the expansion of the core will upset the tip of the bullet . It a good way to totally **** your bullets .

 

[TOM H]

I have a 333 okh belted mag rifle that I want to size some 338 bullets for .I talked to redding at the NRA show they said if I sized them down twice I.could do it with a regular reloading.press instead of having.to buy an expensive H press and buy one .I am not sure what kind or size sizer to buy .You have to make a ram to push them through the die .I.wish I.knew someone who know how to do this .I know that you can't use bonded bullets but you.can use partitions and regular bullets .I.want to do about a 1000 that should last a lifetime for me !

This article may help

https://www.americanrifleman.org/ar...own-jacketed-bullets-for-obsolete-cartridges/

 

[CatShooter]

I have a 333 okh belted mag rifle that I want to size some 338 bullets for .I talked to redding at the NRA show they said if I sized them down twice I.could do it with a regular reloading.press instead of having.to buy an expensive H press and buy one .I am not sure what kind or size sizer to buy .You have to make a ram to push them through the die .I.wish I.knew someone who know how to do this .I know that you can't use bonded bullets but you.can use partitions and regular bullets .I.want to do about a 1000 that should last a lifetime for me !

Contrary to some opinions, this is actually a fairly common practice. For example, there are TWO different sizes of 8mmx57 Mauser bores - the early 0.318, and the later 0.323. If you have an early rifle, you are up Poopie's Creek - but you can size 323 bullets down to 318 with bullet sizing dies.

C-H dies makes bullet sizing dies. I have bought them and used them, and the resulting bullets shoot fine.

The reason being that the barrel (being smaller than the bullet) swages the bullet down, and the lands force the jacket into the lead core. The fired jacket winds up with sections that "bite" into the lead and keep the bullet and jacket intact.

Go here and see...

http://www.ch4d.com/products/dies/sizing/bsd

 

[Bullet bumper]

You can be lucky sometimes but other times the bullets loose accuracy.
I have seen it happen . You can try it but for 1000 bullets I'm not sure it's worth the investment . No matter what outcome some people may get it still goes against the correct way to make a bullet and for that reason has potential negative effects . A bigger caliber in a tight bore would help reduce the potential negatives.
Some people may not be shooting tight enough groups to see the accuracy loss .

 

[243winxb]

Custom Lube and Size Kit - Lee Precision

I have not sized jacketed bullets.

Corbin swaging has said sizing down more than .005" may leave a lead core loose inside the jacket?

This is because lead does not spring back, after sizing , as much as copper jackets.

Corbin Reducing Dies See - BULLET DRAW DIES

 

[Bullet bumper]

No matter what grip is afforded by bore tightness as the bullet exits the bore all that external support is gone and the very fast rational forces can pop the jacket back out possibly leaving the core loose. A loose core will create rotational imbalance .
It's impossible to predict . It can happen is about all you can say .
.333 is a difficult caliber to work with . I would convert it to a .338

 

[Predator 22]

Contact one of the guys on here from Hammer bullets. I bet he would be willing to make some solid copper bullets for you.

https://hammerbullets.com/