Cast vs jacketed powder charge difference - The Firearms Forum

okyite · 06-14-2009, 08:57 PM

Hi
Is there a general rule of thumb for using the same weight cast bullet as jacketed bullet in relation to the amount of powder.
Ex. If load data calls for x amount of bullseye for a 200 gr fmj bullet, then how much bullseye would I use for a 200 gr rn cast bullet. I was wondering if jacket bullets generally use more powder or less than the same weight cast bullet.
I hope this makes sense
Thanks

22WRF · 06-14-2009, 09:05 PM

Go to the load data in the link, yes the charge will very, remember that cast bullets with out a gas check will lead the barrel if you get them too hot
.
My rule is about 900 fps for cast and no gas check others my go a bit hotter

http://data.hodgdon.com/cartridge_load.asp

Dirtypacman · 06-17-2009, 02:14 PM

General Rule of Thumb (for a new reloader) - Only use recipes from a trusted source.. Don't assume anything anyone tells you unless its backed up - 22WRF has it right, cross check the recipe through the link.

Then buy yourself a reloading book and stick to the min/max posted there until you have the experience to start working your own loads.

stratmeister · 06-20-2009, 11:05 AM

Good advice, buy a reloading book or 2. Cast bullets vary considerably from jacketed ones and even from plated ones.

The amount of powder and bullet profile, hardness, and lube will effect the pressure created in the chamber and can be greatly different, so I am not aware of any 'rule of thumb' except it will be less and start with a low load and build up slowly.

06-14-2009, 08:57 PM	#1
okyite Member Join Date: Jun 2009 Posts: 2	Cast vs jacketed powder charge difference Hi Is there a general rule of thumb for using the same weight cast bullet as jacketed bullet in relation to the amount of powder. Ex. If load data calls for x amount of bullseye for a 200 gr fmj bullet, then how much bullseye would I use for a 200 gr rn cast bullet. I was wondering if jacket bullets generally use more powder or less than the same weight cast bullet. I hope this makes sense Thanks -->

06-14-2009, 09:05 PM	#2
22WRF Advanced Senior Member Join Date: May 2004 Location: Pea Ridge, FL Contributor Posts: 4,271	Re: Cast vs jacketed powder charge difference Go to the load data in the link, yes the charge will very, remember that cast bullets with out a gas check will lead the barrel if you get them too hot . My rule is about 900 fps for cast and no gas check others my go a bit hotter http://data.hodgdon.com/cartridge_load.asp __________________ NRA GOA CCRKBA Happiness is a warm barrel

06-17-2009, 02:14 PM	#3
Dirtypacman Senior Member Join Date: Mar 2008 Location: Merrimac Valley, MA Posts: 908	Re: Cast vs jacketed powder charge difference General Rule of Thumb (for a new reloader) - Only use recipes from a trusted source.. Don't assume anything anyone tells you unless its backed up - 22WRF has it right, cross check the recipe through the link. Then buy yourself a reloading book and stick to the min/max posted there until you have the experience to start working your own loads. __________________ Member HHRG and HSC, NRA Life Member, GOAL Member LTC-A

06-20-2009, 11:05 AM	#4
stratmeister Member Join Date: Jun 2009 Posts: 4	Re: Cast vs jacketed powder charge difference Good advice, buy a reloading book or 2. Cast bullets vary considerably from jacketed ones and even from plated ones. The amount of powder and bullet profile, hardness, and lube will effect the pressure created in the chamber and can be greatly different, so I am not aware of any 'rule of thumb' except it will be less and start with a low load and build up slowly.