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View Full Version : Finished modifying a 311359 mold last night


johnly
12-09-2009, 01:53 PM
I picked up a 4 cavity 311359 mold a while back, so I decided to modify the single cavity mold I had which drops WW alloy at .312" for use in my 32 Magnum and my Marlin 1984 32-20 rifle.

I dialed in the mold cavity on the mill and bored a .200" hole through the cavity. I then made a couple of pins from a #8 reamer blank to produce a FP and HP nose configurations with the results in the picture. The FP bullet weighs 116 gr. and the HP version is right at 100 grains. I still need to do some work on the HP pin as there isn't enough of a flat area to make fill out of the bullet consistent.

John
HORNET
12-09-2009, 02:00 PM
That looks like they should either be more effective than the pointy version. That HP version might be a bit extreme in expansion for anything edible....
johnly
12-09-2009, 02:24 PM
The HP cavity only extends down as far as the first bit of full bullet diameter, so I would expect that the nose section would shear away at high speed.

I thought that using a reamer blank would be a quick way to make pins; not the case. Even after heating the pin to red heat in an attempt to remove some of the temper, cutting the pin with a freshly sharpended carbide tool was a chore. I'll have to see if a diamond tool does better, or just machine another pin out of softer steel.

John
HORNET
12-09-2009, 02:51 PM
There shouldn't be any real need for them to be hard. IIRC, the pins on my old Lyman/Ideal's are pretty soft. Heck, the blocks aren't even very hard.
johnly
12-09-2009, 03:03 PM
The reamer blank wasn't selected for its hardness. It was the right diameter and has a nice surface finish right out of the bin.

John
Bret4207
12-09-2009, 05:49 PM
Sweet! You made it into a 311316.
Wayne S
12-09-2009, 06:54 PM
[QUOTE=johnly;741629 The FP bullet weighs 116 gr. and the HP version is right at 100 grains. I still need to do some work on the HP pin as there isn't enough of a flat area to make fill out of the bullet consistent.

John[/QUOTE]
What did the bullets weigh before you modified the mold ? seams mine are in the 118 +- gn range, figured the FP would added a few gn.'s ??
johnly
12-09-2009, 06:57 PM
Only because I dosed off [smilie=6: and missed out on the NOE group buy... :killingpc
beagle
12-09-2009, 07:08 PM
That ought to work good in the .32 Mag. Too much cavity for the velocity in the .30 Carbine from my experiences.

You ever think about removing the GC shanK?/beagle
johnly
12-10-2009, 02:29 AM
That ought to work good in the .32 Mag. Too much cavity for the velocity in the .30 Carbine from my experiences.

You ever think about removing the GC shanK?/beagle

I think it would be easier to modify a 311410 mold....

John
Buckshot
12-10-2009, 02:54 AM
I thought that using a reamer blank would be a quick way to make pins; not the case. Even after heating the pin to red heat in an attempt to remove some of the temper, cutting the pin with a freshly sharpended carbide tool was a chore.

John

.............They're high speed steel which isn't a simple heat/quench to harden, or heat and cool slowly to temper. One nice aspect is they're generally very uniform. Grinding is the best way to create HP pins using HSS.

Nice work BTW!

............Buckshot
johnly
12-11-2009, 02:36 PM
Machined a new pin out of 303 last night and had to fire up the pot just to see how the new pin worked. I think this one is going to work just fine.
Blammer
12-11-2009, 02:56 PM
they both look good!

nice work!
HORNET
12-11-2009, 03:09 PM
Looks good. That should give you much more consistent fill out. What does the weight run at now? Hope you ran a few pounds worth while you had it going....
beagle
12-11-2009, 03:14 PM
The second one is definitely a "keeper". Good going./beagle
OutHuntn84
12-11-2009, 03:42 PM
Wow looks good.
johnly
12-12-2009, 02:24 AM
Looks good. That should give you much more consistent fill out. What does the weight run at now? Hope you ran a few pounds worth while you had it going....

With the new pin the bullets weigh 114 grains as they drop out of the mold.
358wcf
12-12-2009, 10:57 AM
Looks like a very effective small game boolit. Just the thing for the 32Mag, might even work at 32Long velocities with that large opening- A hunter's dream, in my humble opinion- Keep up the good work!

358wcf [smilie=1:[smilie=1:[smilie=1:
Nora
12-14-2009, 02:08 AM
Nice lookin' boolits John!!

Could you also post a couple of pictures of the mold post mod? I'd like to see what you've done.

Nora
johnly
12-15-2009, 02:22 PM
Here you go:
Buckshot
12-16-2009, 12:43 AM
...............What holds the HP pin assembly in place?

...............Buckshot
johnly
12-16-2009, 12:59 PM
...............What holds the HP pin assembly in place?

...............Buckshot


It's an interference fit, a .200" pin in a .200" hole. Relax the grip on the handle and it can be removed, and grip it tightly and it stays in place. I cast with a Lee pot, and the pin assembly is the "right " length to let it rest on the base of the pot while the leas is dispensed. I have found that it works best to pressure cast HP hollow point bullets as it helps with the fill out around the pin.

John