Rant on bullet mold temperature
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- Опубликовано: 6 сен 2024
- Some key points:
The bullet base tells you what is happening.
Crater? Bullet hasn't solidified before sprue is cut, mold is hotter than sprue knife.
Ridge? Sprue hasn't solidified before it is cut, knife is hotter than mold.
Fins at base? Pouring pressure is too high.
Uneven fillout? Pouring flow is too low.
Want best results? Find a fast casting tempo that sustains the temperature in the mold while pouring straight in the hole to keep the knife cool.
great video, just cast my first few minie rounds today, 530 grain, noticed on the second pot the flow was much better and saw much better results
I have been fighting with wrinkles or frosting. Everyone keeps telling me mold temperature or melt temperature... I am so glad i found this video, I am not casting a 200 grain or smaller bullet, I am casting 400-600 grain bullets. I will play with my pour speed and keep my temperature around 730 and see what happens. I will try and video my results, would love to hear your comments on it
Very good explanation. I’ve always said casting is part science, part voodoo, and part pure luck😁
Tack för alla dessa videos Jonas! Det dyker alltid upp nogot man inte tänkt på som underlättar vid njutning och coating. Silikonmetoden du postade tidigare gjorde att coatingen kom till en helt ny nivå 👌
This is a fantastic video. Can you please tell me the average temp you cast and what is the normal temp of your moulds? Please make more casting videos.
I am testing a home made mold today for the first time. It is based upon the lee designs. .312 inch 225 grains. I will follow your advice.
As the pot empties the temp rises. You can add sprue to the pot when this happens and keep the pot temp relatively stable.
Yes? That's exactly what I advise in this video. Keep adding both sprue and new ingots/ww to keep the level steady.
Casting pace matters. Too fast and the mold gets too hot and makes frosted bullets. Frosted bullets tend to be brittle.
Wrinkeled bullets can also be lead or mold too cool or oil in the cavity.
I like about 700 degrees farenheit.
I keep a pot of lead off to the side and add a ladle of lead to the bottom pour pot when it gets too the half way mark. When casting big heavy bullets i put the mold up to the spout and let the weight of the lead on the pot create good fill out of bullets
With six cavity handgun bullets i try to get the lead to flow dirrectly into the sprue holes but it isnt critical.
I have cast at least 25,000 good bullets and my share of bad ones too.
John Davis jax fl
Excellent advice, but are you sure about the 400F, I have mine pot set at 410C, PID controlled as well...
Sorry for the mix and match. I run the PID at 400C, then spoke about 1000F.
Thanks for the information. Do you add anything to your wheel weight alloy? And do you know the BHN of your casting?
I run straight wheel weight alloy for most of my casting. For low pressure rounds I sometimes add 50% range scrap, mostly because of availability. WW is pretty standard in hardness and there are tables for it depending on air cooled, water dropped or oven treated.
Hmmmmm I’m curious if your advice would work/apply to a lee 1oz key drive slug
I have never tried it, but know of people who do with good results. There are also commercial slugs available with coating.
One thing to think about is hardening, the slugs are usually made of soft lead, if your alloy is like wheel weights it will harden when baking the PC. Can lead to high pressures in your choke.
@@Whistler84 I agree I’m just having issues with the mold not being hot enough. You really have to have a lot of heat to fill out that mold 1oz of lead is a lot. All my molds are falling apart due to the heat
Kan man köra mjukt bly sen pulver? Eller måste man ha hårdare bly? Tänkte på 308 win?
Det hänger framför allt på rotationshastigheten. Ju fortare kulan snurrar genom hög hastighet eller tight twist på pipan desto hårdare behöver blyet vara. För 308 Win runt 2100 fps duger hjulviktslegering med gascheck. Rent bly ska du bara ha till svarkrut.
@@Whistler84 det bly jag har ligger runt 9 till 12 i bh
Lead won't melt at 400
Celsius.