donnrcp
09-13-2014, 11:43 PM
OK, it's time to see if I've got this right. I have been casting Lee 1 oz slugs and using what appears to be pure lead I get at a recycling center. One time, I was able to get 13 lbs 15 oz of 40% tin and lead bars. If my goal is the hard cast recipe for making pistol boolits (2% tin, 6% antimony, 92% lead) I need a source for antimony. Looking at 10 lb batches I have the following breakdown:
6% of 10 lbs is 9.6 oz
2% of 10 lbs is 3.2 oz
92% of 10 lbs is 9lb 3.2 oz
One 5lb bar of Super Hard has 1.5 lb of antimony, 1.5lb is = 24 oz, 24oz is = 2.5 batches of 10lb hard cast alloy. 25 lbs of hard cast is = 875 200 gr bullets.
40% tin is 6.4oz tin per lb of 40/60 which is 1/2 lb per 10lb batch
1/2 lb 40/60 tin/lead+2lbs super hard+7 1/2lbs pure lead= 10lbs hard cast
Super Hard is 19.99 per about 5lb from Roto Metals
I have enough tin for 27.875 10lb batches of hard cast which is 9756.25 200 gr bullets
25lbs of hard cast is 875 bullets, 9756.25 bullets/ 875 is = 11.15 bars of super hard
11.15 x 19.99= $222.89
222.89/ 9756.25= $0.023 per bullet for the antimony
11.15 x 5 = 55.75lbs
9756.25 bullets is = 278.75lbs
278.75-55.75= 223
223lbs @ 0.75 per lb = $167.25 or 0.017 per bullet for the lead and tin
Total is 0.017+0.023= 0.04 cents per bullet
That was fun, does it sound right?
Big question is there a cheaper source for antimony?
6% of 10 lbs is 9.6 oz
2% of 10 lbs is 3.2 oz
92% of 10 lbs is 9lb 3.2 oz
One 5lb bar of Super Hard has 1.5 lb of antimony, 1.5lb is = 24 oz, 24oz is = 2.5 batches of 10lb hard cast alloy. 25 lbs of hard cast is = 875 200 gr bullets.
40% tin is 6.4oz tin per lb of 40/60 which is 1/2 lb per 10lb batch
1/2 lb 40/60 tin/lead+2lbs super hard+7 1/2lbs pure lead= 10lbs hard cast
Super Hard is 19.99 per about 5lb from Roto Metals
I have enough tin for 27.875 10lb batches of hard cast which is 9756.25 200 gr bullets
25lbs of hard cast is 875 bullets, 9756.25 bullets/ 875 is = 11.15 bars of super hard
11.15 x 19.99= $222.89
222.89/ 9756.25= $0.023 per bullet for the antimony
11.15 x 5 = 55.75lbs
9756.25 bullets is = 278.75lbs
278.75-55.75= 223
223lbs @ 0.75 per lb = $167.25 or 0.017 per bullet for the lead and tin
Total is 0.017+0.023= 0.04 cents per bullet
That was fun, does it sound right?
Big question is there a cheaper source for antimony?