Turning bullets with gang tooling

[JFettig]

Yesterday I set up my lathe with 3 tools, an angled parting tool which will do all the turning, grooving and cut off, a #0 center drill, and a .0905" drill(I happen to have like 10 of these for no good reason).



I don't have solidworks, autocad or my other drawings here, so I started all over. I drew up a .308 cal bullet by hand, did some number crunching and came up with this:



I'll post a vid later!

Jon

[Brian T]

Pretty sweet looking, please post the results when you shoot some.

What do they ?

[WhisperFan]

How much do they weigh?

[JFettig]

Heres a video of the process, I turned down the rapids, will turn them up and fine tune the program later.
http://www.youtube.com/watch?v=0ZDqe2lJA9c

Not sure how heavy they are yet, probably around 180gr, I don't have my scale here at the shop. They are for my 300/221.

Jon

[JFettig]

I have some results!

I was a nervous wreck, but I checked and rechecked like 9 times, the diameter is exactly .3081"(I think spec is .3080 to .3085).
It sure is nerve wracking..

I loaded it up with 8.0gr of AA#9, 8.2 is maximum for subsonic with a 220gr.
I weighed the bullet, its actually 213gr, not 180 range I thought it would be. 2.200" OAL, the tip was too big to load it any longer.



I have a bunch of catalogs, stuck them in a 24pack cardboard box, wet them down. I didn't give it enough time to soak, the middle of the thick catalog the bullet stuck into was dry.

Anyway, I didn't chronny it or shoot for accuracy, just shot to hit the box full of catalogs. I had some serious doubt that I'd see anything, sure enough it expanded!!!





It only went about 6" deep, it started to tumble, made it about 70 degrees around.

I'm gonna make a tool to skive the inside to create expansion initiation groves. I'll order some coppper, C145(more machinable than C110). If those expansion grooves don't work, I may slot it from the outside.

The cavity was about 2.5" in diameter at its largest point. When I get something down, I'll see if I can shoot some upsets in ballistic gel.

Jon

[Artful]

AWESOME