which way does the powder charge go?

[Alpo]

You're loading a cartridge. You have a jacketed bullet that weighs x amount. And it takes y amount of powder.

 

You have a lead bullet that weighs the same x amount. It takes z amount of powder.

 

I know the charges are not the same for lead bullets versus jacketed bullets. I just don't remember which one takes the lower charge.

 

It seems like a lead bullet would take a lower charge. That lead drags more on the barrel. More friction, therefore more pressure for the same powder charge. So you use a lower charge for lead then you do for jacketed of the same weight.

 

I think.

 

Does anyone happen to know? Is it consistent?

 

Let's say a 230 grain lead 45  at 850 ft per second uses a lower powder charge then a 230 grain fmj 45 also at 850 ft per second.

 

Would that mean a 158 lead 38 Special at 900 would use a lower powder charge than a 158 jacketed soft point 38 Special at 900?

 

I don't want to get into a discussion of "this lead bullet uses a lower powder charge because you shoot lead at a lower velocity than you do jacketed".

 

I'm going for the same weight at the same velocity.

[Perro Del Diablo]

Lead takes lower because will cause lead fouling if to hot. The other way to get more with lead is copper cup on base of bullet.

[Pat Riot]

Also lead slides easier through the bore. It takes less pressure to launch it. 

[Alpo]

1 hour ago, Pat Riot said:

 

Never mind. Brain fart.

Edited December 13, 2024 by Alpo

[Pat Riot]

1 minute ago, Alpo said:

So for the same weight bullet, for the same velocity, a jacketed bullet would take a lower charge.

 

A hypothetical example would be the jacketed bullet would use 10.2 grains of powder x while the lead bullet would use 11.4 for the exact same velocity with the exact same weight bullet?

No. Vice Versa. 
In a .357 Magnum using W244 powder the max load for a 158 grain FMJ is 6.2gr at 1204 FPS. Pressure is 33,100 PSI

For a 158 grain LRNFP the max load is 6.0gr at 1255 FPS. Pressure is 27,800

 

This is from the Hodgdon Reloading website. 
https://hodgdonreloading.com/rldc/?t=2

[WOLFY]

jacketed bullets need more pressure to be pushed out the bbl

Edited December 13, 2024 by WOLFY

[Subdeacon Joe]

Cloth end goes in first. 

 

[Pat Riot]

6 hours ago, Subdeacon Joe said:

Cloth end goes in first. 

 

What is that silver band? 

[Forty Rod SASS 3935]

Jewelry.

[Subdeacon Joe]

2 hours ago, Pat Riot said:

What is that silver band? 

 

 

Metal straps to hold the shot or shell onto the sabot.

 

 

 

 

Shot had the straps just crossed.  Common Shell and Spherical Case had a ring to expose the fuse.  Canister just tied onto the sabot.  Straps would have been zinc coated to prevent rust.

[Pat Riot]

1 hour ago, Subdeacon Joe said:

 

Metal straps to hold the shot or shell onto the sabot.

Are these for a cannon? I don’t think I have ever seen loads like this for a rifle. 

[Subdeacon Joe]

3 minutes ago, Pat Riot said:

Are these for a cannon? I don’t think I have ever seen loads like this for a rifle. 

 

Yep.  The images are of munitions for smooth bore guns.  The rifled guns had the powder bag affixed directly to the projectile without a wooden sabot.