9mm cast bullets--leading?
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Old 09-12-2011, 05:26 AM   #1
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Default 9mm cast bullets--leading?

Hey, I am trying to decide between 124gr and 147gr hard-cast bullets for plinking. My defensive loads are 147gr, plus 147gr loads would allow lower velocities and thus less leading. However, with moderate loads pushing a 124 to probably 1000-1050fps, will I get much leading?

The only reason I ask is 124gr bullets are about $10 cheaper per 1000, and because the slightly higher velocities will allow for a little flatter trajectory.

But, about how fast can I push them before I get any leading?

I will be loading with Unique powder.

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Old 09-12-2011, 09:07 AM   #2
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Depends on how hard the cast bullet, how rough the bore. In general, you should be fine at the velocities mentioned.

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Old 09-12-2011, 09:37 AM   #3
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In my experience, the small case of the 9mm causes the velocity of the bullet to go from 0 to significant in a very short distance. The alloy is less important than the OAL. Loading cast bullets as long as possible is the key to prevent leading. Try to load at or very close to max OAL and test to see if the round will chamber w/out contacting the rifling. I have yet to find the bullet design that will not allow this at the max OAL.

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Old 09-12-2011, 03:53 PM   #4
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Would it be better to use the 124gr bullets for the extra case capacity, or does it not really matter much?

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Old 09-12-2011, 05:29 PM   #5
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I run 147gr Missouri Bullets Subsonic. I get some leading but not so much that it is really a problem. I'd rather clean a leaded semi auto than a revolver.
I use Unique (3.6 gr) and there is not a problem with case capacity. Heavy bullet, small charges.

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Old 09-13-2011, 12:34 AM   #6
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are 115 good for target shooting? or should I use a heavery bullet?.

hard Cast or soft lead?.

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Old 09-13-2011, 01:48 AM   #7
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Definately hard cast. I shoot 125 gr round nose and round nose flat point bullets cast pretty hard, but not crazy hard.

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Old 09-13-2011, 02:56 AM   #8
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thanks robocop10mm! the ones I'm thinking of getting have a hardness of 18 brinel I think.

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Old 09-13-2011, 05:04 AM   #9
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18 BHN should be GTG. Just remember to load long.

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Old 09-13-2011, 05:12 AM   #10
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Your cast bullets should run out at .356. Bullets that run .354 or .355 will lead as gas will pass around the bullet allowing melted lead to stick to the bore. I assume you have slugged the bore and know what size it is. You should run one number over bore size in cast bullets. The 9MM is more difficult with cast than some of the other calibers.

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