Not sure if this is the right place to post this thread, but it is not gunsmithing
I have seen and read several variations on converting conventional cast bullet molds to hollow point design, so tried my own method.
Having both a mini lathe and mill, (for around 4-500 bucks each, these tools are hard to beat for small machine work) thought the making of a hollow point mold could be simplified farther.
Found that with a couple wraps of electrician’s tape, could get the bullet to run true chucked up lightly in lathe. I kept a check on run out with dial indicator when drilling.
Started hole with center drill to insure true.
Then followed with a 3/16” drill.
Result was a hole drilled true on center to the bullet.
Positioned mold square in vise and aligned so a 3/16” rod could float freely in hole, then locked table down.
Then drilled hole in mold flooded with light oil, withdrawing drill frequently and blowing out hole with compressed air.
Made hollow point tool.
Drilled and tapped mold block for 10-24 screw with large flat head for latching in place.
End result, what looks like a good hollow point mold, now to get it out to shoot and see how it performs.
Excellent work! Have you checked the runout of the hollow point since modifying the mould?
You're a handy feller. That is slick. Looking forward to the report
11 Team 444
Real nice. l also will be interested in your test results and see what your outcome w/ hollow points is. thanks
Got some cast up and very pleased with the results. I was a little concerned after casting a few, for the hollow point holes indicated 0.02” to 0.04” runout, but the boolits worked out good and the .45-70 accuracy did not suffer at all.
I had to make a different pin, as the first one was short and I had the wooden knob on it, had cast very few boolits when the wood started smoking and charring. (that big cast iron mold does get hot) So made up a longer pin and took another’s advice to forget the wood and manipulate the pin with pliers (small pair of vice grips in this case)
In pic, the boolit on the left is the one I used as a pilot to drill the mold,
don't cast myself...so a quick question, why hollow point all the way thru? ah ha...not completely thru, just the pilot run.
Last edited by 1 big hole; 01-07-2012 at 04:49 PM.
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