Design question

[Harter66]

I've seen some amazing stuff here and I learn new stuff almost daily. This morning I read about on going cast efforts w/the 300BLK . I have an 06' that will shoot that 24?gn boolit ,don't ask, short version special order 1965. As I read further someone mentions sub-sonic dum-sums,and the response is , wide noses and rebutted bases gitter done sub-sonic.

So why not a double ended SEC w/2 lube grooves, at least for "nominal" pistol weights?

[JIMinPHX]

What is a rebutted base?

[Harter66]

Rebated?

A boat tail w/a step like the VLD type bullets.

[stubshaft]

If it's double ended how will you lube it? Other than using mule snot or 45/45/10?

[Harter66]

I have a hands on method w/Barry Darts. I rarely load in lots over 100 except for my 9 then its 150 . So I guess I'd just keep on hand lubing.

If they were for rifles that'd make patching interesting,as a flash thought of only its own value.

[turbo1889]

So you are talking about basically the same idea as a DEWC only it’s a DE-SWC with both ends having a SWC nose shape?

[Harter66]

That is correct.

A 38 w/.25x.25 noses 150-160gr,I think might be as good as it gets. 30s would be challenging , I don't see any real gain to be had over 100-125gn. 45s could win I think from 260-350.

Just loose rattling ideas usually the result of too much time on my hands.

[SwedeNelson]

Harter66

The infamous "Push-me Pull-ya" bullet.
I have a picture of one some place.
Will see if I can find it.

Only problem I can see is - were do you put the GC ????

Swede Nelson

[thehouseproduct]

I'm curious. I'd like to see something a little different.

[SwedeNelson]

My Dad had a whole line of "Push-me Pull-ya" designs
He use to joke about his most famous one was the Studebaker.
http://i69.photobucket.com/albums/i80/swedenelson/360pushmepullya.jpg

Swede Nelson

[Harter66]

No checks......................2 poles.

Apologies for ethnic taboo,couldn't help it.

Did it shoot?

[MikeS]

That reminds me of a sign we had by the cash register... "We love checks, and stripes, and plaids, but when you pay we need cash!"

[ohland]

My Dad had a whole line of "Push-me Pull-ya" designs
He use to joke about his most famous one was the Studebaker.
http://i69.photobucket.com/albums/i80/swedenelson/360pushmepullya.jpg

Swede Nelson

Somebody probably wants one in order to try using a copper ring inserted into the mould before casting to act as a gas check. The problem is inserting the ring into a very hot chunk of metal.

[Harter66]

I just went back and reread my thread,no wonder there was confusion. Darn new phone has to relearn all the abbreviations all over SEC/SWC for example.

Swede thank you for the info, I will dabble around a bit in the shop and get back to you maybe run a feeler for 1 or more of such a novel beast if it works out as turned boolits. No objections to me using your drawing to fab the tool mentioned below?

Ohland,
I've heard of the zinc and copper inserts even checks in nose pours and thought the same thing,hot blocks,cold moulds,lil' tiny pieces of hot metal,just doesn't sound like fun.

So I'll pour a WDWW rod or 2 fab a simple cut off tool ,make 15-20 boolits and see what happens. No time like the present.

[ohland]

Was going through a scanned copy of Harrison's Cast Bullets...

http://castboolits.gunloads.com/imagehosting/thum_179094e25faf1c2845.jpg (http://castboolits.gunloads.com/vbimghost.php?do=displayimg&imgid=1515)

There is nothing new under the sun, or so it appears...

Would I want to insert copper bands in a 700 degree mould? Not really... Could it be done? Yes. I look forward to the op that demonstrates a reliable way to do so.

Turn a shaft so it holds the band, and upon hitting a lever or button, the shaft reduces, leaving the band in place. Imagine something like the 5C expanding collet, or a reverse acting claw pick up... Insert the band from the bullet base (assuming base pour) so that you have clearance. I could see trying to insert it from the side with a base on the inserter that rests on the face of the mould block. Think of something like a pair of fishook pliers... Sorry, I only drink one beer a day, and the effects are fading...

Hmm, turn thick wall tubing to correct OD, use mini cutoff tool to part (Nickole systems fer instance). Use stiff wire on magnetic base to catch cutoff bands before they fall into the swarf pile below the chuck... Hmm, .358 is @ 3/8 inch. You could buy thin wall tubing at Ace Hardware... Damn, now I'll have to buy an ER32 4MT collet chuck for my lathe...

:drinks:

[ohland]

For .358 diameter boolits, a suitable band might be parted from some K&S brass tubing available in Ace Hardware. One size is 3/8 with .029 walls, assuming the OD is .375, (375-358=17) that is thinning the walls down @ .008" each side. I think.

I have some cut off inserts inbound for my Nikcole mini-system bar. My ER32 collets arrived yesterday, ordered an MT4 ER32 chuck. Use a CCMT to shave the tubing...


:Bright idea:

[Harter66]

Wow,nothing like jumping in w/both feet! From geewiz to buying full tilt tooling in 3 short days..

[ohland]

Nothing doing, here. Need to turn a short length of 18mm x 2 for someone. The ER32 2MT will be mounted to a rotary table for accurate indexing. The ER32 MT4 will allow accurate lathework. My three nozzle coolant base came today, need to set it up for eventual milling with an annular cutter.

Amazing how much isn't done...

Snap, a 3MT turret would help with a chamfering tool. The cut off inserts are right hand, so the band would be clean at the parting, but the starting end would have a burr.