Cast my first boolits today!

Jector

New member
FYI - I called Lee about the bullet in the top picture, middle; filled out on one side but not the other. The rep at Lee said it was most likely a dirty mold and recommended a solvent such as carburetor cleaner to clean it.
 
A good solvent cleaning should cure it. Brake cleaner or the like.

A normal rule of thumb is to size bullets 0.001" to 0.002" over groove diameter for least leading and best accuracy, so I would look for a .453" sizer if you are going to size them. In general, too big is better than too small, because too small tends to allow gas bypass and cutting of the bullet base that can introduces further leading and spoil accuracy.
 

Jector

New member
Thanks, I'm sizing some now. 0.453. I ordered a 0.452 die but the bullets are dropping out of it at 0.453, which I think will be fine. I'm just trying to tweak it so it will fill the lube grooves without getting lube on the ogive. Temperature / pressure relationship, temp. too high and the lube flows into the die resulting in lube on the ogive, too low and the lube grooves don't fill. I'm trying to warm the bullets to see if that helps. In theory a hot bullet will allow the lube to flow into the grooves easier while keeping the press temperature and therefore the lube a bit cooler (~110F) so it doesn't flow into the die between bullets gunking the ogive. :confused:
 

Jector

New member
Pouring ingots

Bent up my stainless steel spoon yesterday to make pouring easier since I don't have a ladle. Just thought I'd share...

There was a picture here but the server deleted it for some reason.

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The lead pours much more controllably through the bent up spout at the tip.
 

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Jector

New member
Hardness...

Here are some VERY back of the napkin hardness testing results...

The bullet on the left was heat treated in my kitchen oven at ~430 deg F for one hour then quenched in cold water for 5 min. Then let sit for 2 days to age harden. The bullet in the middle was quenched from the mold (dropped in water). The bullet on the right was air cooled from the mold. I simply laid the heat treated bullet next to each of the others one at a time and squeezed with a vice-grip pliers at no particular pressure. From the results you can see the heat treated bullet is much harder. All were cast from the same batch of alloy, wheel weights.

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I also did the squeeze test against a bullet for Oregon Trail that I was told has a BHN of 24. It did leave a mark in my cast .45...

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Makes me wonder if my heat treated .45 is too hard?
:confused:
 

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Jector

New member
Oh, and just for comparison, here's Quenched from mold on the left vs. Air cooled on the right...

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Same alloy as above.

Quenched; obviously a bit harder.
 

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Rangefinder

New member
Makes me wonder if my heat treated .45 is too hard?

Too hard? Nope--you aren't gonna get a lead alloy even close to the hardness of a copper jacket, and if you can find a way to make it harder than the steel of your barrel (which is about they only way I could consider a projectile too hard), then you really ought to retire on the billions you get from the chemistry patent. ;) Looking pretty good from where I'm sitting.
 

snuffy

New member
Here are some VERY back of the napkin hardness testing results...

I'll say!:rolleyes: Now get yourself a lee hardness tester, so you really know how hard they really are. Good thinking though, relative hardness is a good tool to estimate, or see results.
 

Jector

New member
I'll say! Now get yourself a lee hardness tester, so you really know how hard they really are.

I'm actually working on building a hardness tester, the formula is simple enough...

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Formula from Wikipedia / Wikimedia.org.
 

snuffy

New member
Yeah, that formula and $42.99 will get you a lee hardness tester. Nice idea for testing hardness, but you need machinery to do it, not mathematics.

http://www.midwayusa.com/viewProduct/?productNumber=731364

A certain sized ball, pressed with measured pressure into the material being tested, then being able to read how far that ball penetrated that material. That's what hardness testing is all about.
 

trip_sticker

New member
Basic Rules for Harding Lead-


For every 1% additional tin, Brinell hardness increases 0.3.
For every 1% additional antimony, Brinell hardness increases 0.9.
For a simple equation,
Brinell = 8.60 + ( 0.29 * Tin ) + ( 0.92 * Antimony )
 

Jector

New member
Thanks snuffy and trip,

I came to my senses and ordered the tester. I was gearing up pneumatic cylinders with microcontrollers and sensors ( I do like building ****) to get some simple data. Anyone want to buy a pneumatic cylinder, 2" bore - 1" stroke. :D
 
2" bore, 1" stroke.... :D I am looking for a 3" bore, 25" stroke, 38.25" retracted, 1.25" pins, 3.5" base clevis, 2" rod clevis, and rated to 3200 PSI.. If ya got 2 of these layin' around, I'd be interested... :eek: :D
 
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