A question for the Moderators, Nosler 1, 2, 4, & 3.

[SOTN]

Obviously, there is no such problem, but why doesn't the exposed lead at the base of Nosler Partition bullets get damaged when they are fired.

We often use Gas Checks on Lead bullets in revolvers to keep them from being damaged, and the pressure and velocity is much less.

I've notice that military FMJ bullets also have lead exposed at the base.

I've always wondered about this. Any insight??
Thanks
Smitty of the North

 

[Ol` Joe]

I`m not Nosler but I think they will agree it isn`t that you have a copper base but where the copper is on the base that counts. The Nosler bullet if you look has a "fold" of jacket material that extends down over the edge of the base. This protects the bullets base where it contacts the barrel. The jacket material helps prevent gas cutting on the edge which could cause gas to exit in a non-uniform flow from behind the bullet as it exits the barrel. The uneven gas flow can upset the bullet causeing accuracy problems.
As for the exposed lead on the base of Nosler bullets, thre is very little time under heat with a bullet traveling down a bore. Take running your hand through a match flame vs holding it in the fire. The lead may or may not melt slightly but it will need to "boil" off to do any measurable damage.

 

[Sharpsman]

Obviously, there is no such problem, but why doesn't the exposed lead at the base of Nosler Partition bullets get damaged when they are fired.

We often use Gas Checks on Lead bullets in revolvers to keep them from being damaged, and the pressure and velocity is much less.

I've notice that military FMJ bullets also have lead exposed at the base.

I've always wondered about this. Any insight??
Thanks
Smitty of the North

Smitty

Yep! Here's some INSIGHT! I've shot thousands of rounds through 1874 Sharps rifles and 1885 Hiwalls using all-lead cast bullets which I pour up and at ratios of 40-1 lead/tin and 20-1.....accuracy IS NOT A PROBLEM! :wink:

 

[SOTN]

I`m not Nosler but I think they will agree it isn`t that you have a copper base but where the copper is on the base that counts. The Nosler bullet if you look has a "fold" of jacket material that extends down over the edge of the base. This protects the bullets base where it contacts the barrel. The jacket material helps prevent gas cutting on the edge which could cause gas to exit in a non-uniform flow from behind the bullet as it exits the barrel. The uneven gas flow can upset the bullet causeing accuracy problems.
As for the exposed lead on the base of Nosler bullets, thre is very little time under heat with a bullet traveling down a bore. Take running your hand through a match flame vs holding it in the fire. The lead may or may not melt slightly but it will need to "boil" off to do any measurable damage.

Thanks, Joe:
I guess that makes sense. You are protecting the edge of the bullet with both gas checks and the jacket of the bullet. I had considered the time factor also.

With very hard cast bullets that cannot obturate, they can be deformed from the gas leaking around the base. The Nosler Partition bullets, I'm using now have a very slight bevel of the jacket around the base too
Smitty of the North

 

[FOTIS]

why doesn't the exposed lead at the base of Nosler Partition bullets get damaged when they are fired.


Thanks
Smitty of the North

Not enough time for the heat to act on the exposed lead.