tmj vs fmj ammo

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wondering if one should be used over another or if there are problems with tmj ammo. i have only used fmj ammo so far.

so far the difference between the two that i am aware of is that tmj ammo has an extra "casing" over the round to fully cover the bullet.

i have a g19 and a norc 1911 .45
 
I've used both with no differences noticed. One member at my range does say that using TMG at the indoor range is better for not breathing in lead partials but I can let you know if that's true in about 30-40 years :p
 
yeah TMJ is better for indoors, since the bottom of the bullet doesnt have exposed lead

Katana said:
I've used both with no differences noticed. One member at my range does say that using TMG at the indoor range is better for not breathing in lead partials but I can let you know if that's true in about 30-40 years :p
Click to expand...
 
TMJ's and CMJ's, same thing from different makers, are plated, not jacketed. Both use cast bullet data. FMJ's are jacketed. Difference, aside from the plated bullets being closed on the end, is the thickness of the copper. About .08mm vs .2mm. Plated bullets don't get driven as fast as an FMJ can be.
 
THANK YOU sunray.

Everytime this question comes up, everyone talks about the exposed lead at the base but no one mentions the main question, i.e. plated vs. jacketed.

I'll repeat what I said last time this thread came up: I've purchased thousands of bullets marketed at FMJ that didn't have exposed lead at the base.

Just take a look at Wolf Bullet's site. Wolf loads lead (least expensive), TMJ (a bit more expensive) and FMJ (most expensive). Now why would he charge considerably more for bullets with exposed lead as opposed to ones with no exposed lead? Because neither of them have exposed lead at the base. The difference between the two is that the TMJs are lead bullets covered by a very thin, electroplated copper layer (like Berrys, Frontier, etc.) and FMJs have true, thick copper jackets (like Hornady, etc.)
 
A small amendment to the above description. Yes, TMJ is a plated bullet, however it is also a patented process owned by Speer as is the name. Speers plating is considerably heavier than other manufacturers who use a thin layer. Speer also swages the bullets AFTER the plating process, ensuring consistency. A lot of folks like to refer to the plated bullet from other manufacturers as a TMJ which is a trademarked name when it really is an EMJ or Encapsulated Metal Jacket as a result of the plating process. A CMJ is not a plated bullet but rather a fully jacketed bullet similar to the FMJ, with a metal disc at the base, covering the small amount of exposed lead on the FMJ. With all the lawsuits flying around the US I am surprised that Speer has not taken action to protect their process name.
Just wanted to make it known to those who were not aware, which is most folks, in an effort to keep it factual.
Cheers
dB
 
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