Never knew how the cavities were bored. Thanks for the keystrokes and pics.
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Some of my favorite recipes start out with a handful of depleted counterbalance devices.
Ok I need more experience/understanding of machining processes. Hope to get the chance to learn more in the near future!
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The actual cutter is under sized to fit inside the moulds lube grooves with a small amount of clearence then feed in y axis out to make the dia of everything correct. Think of this as a single flute form cutter. Since lube groves are around .020 on a side deep then cutter needs to be .050-.060 undersized to fit in pilot hole. The Mould could be bored with a single point boring bar also but that is more work and much more work. A digitlal readout makes the single point way easier.
This is an awesome thread. Great instructional. Please keep the pics coming.
Nothing to add, awesome thread. One of my favorites on this entire forum.
I found this video a few weeks ago, i would venture that your final product is better, but this shows a bunch of the steps in motion picture format. I would be interested to hear how your process differs, in subtle ways.
http://www.youtube.com/watch?v=gCh2T...e_gdata_player
Thanks a ton for posting this, keep it coming!
I'm thinking about building a boolit knurling tool and making this brass mould so it casts smooth boolits. If I go this route I'll definitely take pics.
Last edited by websterz; 03-03-2015 at 08:42 AM.
Aside from the obvious difference in the way he makes his mould blocks there really isn't any difference. In fact I studied the same video before I started building my first mould. Use of the four jaw chuck obviously allows me to work with rectangular material and multiple cavities but other than that it's pretty much the same process.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |