Question about FMJ and TMJ.

Magdaddy · July 12, 2007, 08:26 PM

What's the difference ? and is "copper plated" in this same group ? I tried to search for an answer but did'nt find what I was looking for, I see all of these in reloading manuals and assumed they were the same but have never known for sure, sorry if this seems like a stupid question, and thanks for your help.

Scorch · July 12, 2007, 08:30 PM

FMJ bullets (full metal jacket) have a solid nose, and the core of the bullet is visible in the base.
TMJ (total metal jacket) has a solid nose, and a sealed base piece over the core so the core is unaffected by gases.
Copper plated bullets are not in this category. The plating is much softer than a gilding metal case. Load plated bullets with cast bullet data.

Magdaddy · July 12, 2007, 10:44 PM

Thank you, Sir.

IM_Lugger · July 13, 2007, 08:45 PM

some copper plated bullets are advertised as CMJ (complete metal jacket)...

July 12, 2007, 08:26 PM	#1
Magdaddy Senior Member Join Date: April 30, 2007 Location: North Georgia Posts: 127	Question about FMJ and TMJ. What's the difference ? and is "copper plated" in this same group ? I tried to search for an answer but did'nt find what I was looking for, I see all of these in reloading manuals and assumed they were the same but have never known for sure, sorry if this seems like a stupid question, and thanks for your help. __________________ Give an idiot power, and you just end up with a powerful idiot.

July 12, 2007, 08:30 PM	#2
Scorch Senior Member Join Date: February 13, 2006 Location: Washington state Posts: 15,248	FMJ bullets (full metal jacket) have a solid nose, and the core of the bullet is visible in the base. TMJ (total metal jacket) has a solid nose, and a sealed base piece over the core so the core is unaffected by gases. Copper plated bullets are not in this category. The plating is much softer than a gilding metal case. Load plated bullets with cast bullet data. __________________ Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services

July 12, 2007, 10:44 PM	#3
Magdaddy Senior Member Join Date: April 30, 2007 Location: North Georgia Posts: 127	Thank you, Sir. __________________ Give an idiot power, and you just end up with a powerful idiot.

July 13, 2007, 08:45 PM	#4
IM_Lugger Senior Member Join Date: June 27, 2004 Posts: 2,011	some copper plated bullets are advertised as CMJ (complete metal jacket)... __________________ "I feel the Beretta is a great character, it's so strong and elegant. The other guns look dumb to me." - John Woo