Armory Sponsor
Posted: 10/16/2012 3:41:24 PM EDT
|
Howdy. I have a bit of a problem with a batch of lead I have. I have about 15lbs of the stuff. I started with rough 7lbs in the pot. I heated it to about 725* and made sure the mold was hot. I know the problem is not the mold. Any way the bullets are not filling out very well in the lube grooves and are about 10 grains heavier than the ones I cast on Sunday with a different batch of alloy. 230grains + or - 5 grains. The new mystery mix is dropping them at 240-250 and slightly out of round. I am assuming the out of roundness is due to the poor fill out. I added about 1/2 pound of hard shot hoping to add some antimony and arsenic to harden it up .
What and how much should I add to the mix to harden it up and help fill out? 'Should I add something Linotype or rotometals super hard and how much would I need ? I'm going for about 10-12 brinell hardness for 45 acp loads. Am I over looking something? |
| I haven't cast bullets since the 80's but then used wheel weight (the modern alloy for wheel weights may have changed), routinely rejected the first several pours to two 4cavity Saeco molds to heat the moulds...dropped the cast bullets into water (wear eye protection), and allowed bullets to stand a couple of weeks to help harden before I sized and lubed them....at that point they had a "frosty" looking surface...you could not scratch them with your fingernail, and the made a "tink" sound when dropped... |
|
Quoted:
From my experience: The only thing that will contribute both out of round bullets and heavy bullets is a mold that isn't closing completely. Yes to this. If were just a filling problem I would say the mould is not hot enough and or you are pouring too slow. See if you can access this article from "Handloader" magazine. "The ABC's of Bullet Casting" December 2008 No. 257 |
Armory Sponsor