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I used to work a lot with hole sizes as a machinist that had .0005" total tolerance, say .2510"-.2515" would be the total tolerance range. For that we had hole thousance pins in both + and -, and we...

I agree that it cuts nicer them CM in my experiences so far. I use the Brownells Do Drill which is just as others have said a good dark sulfur cutting oil. Rigid oil from the local hardware store...

A "Good Gunsmith" makes their own decisions based upon their needs, spending double the money on a rougher for every one off rifle you build is a poor economy IMHO and what has been accomplished by...

Well all things are relative. Lots and lots of folks buy a finisher only for their project and the world does not end. And 12L14 is about the kindest steel on earth as far as being free machining and...

Worth taking a chunk of 12L14 and drilling and boring a hole .001 over pilot size, then reaming the whole chamber to have a look at it. I buy 12L14 bar ends off Ebay and try to keep some around in a...

I think the polyfill would do fine. My steel tube was 8" or so in diameter. It was just something I had on hand, it has 3/8" or so wall thickness.

I have used a 4 foot long steel tube packed full of polyfill, the pillow stuffing stuff. Got the idea by shooting through some old couch cushions and seeing that the fiber fill in them would ball up...

I did not ask :-).

I unscrewed the shellholder insert from the top of the ram on my Lee Classic Cast press. The bottom end of it is slotted 4 places like a collet. What is the purpose of the slitted portion ?

The...

Found some 1/2" thick HDPE cutting boards on Amazon to make the storage racks to fit into boxes out of. Had explored how to drill the plywood and somebody suggested nylon cutting boards, turns out...

They should last a long time we would hope. Mailing them around to different folks might not be TOO expensive. The small flat rate box is $10.20 right now.

Bill

That looks really nice. What did they charge you ??

Bill

Nice :-).

Bill

I guess I am not sure on that :-). I have a bunch to store in a variety of calibers. They will do for now but I bet I eventually make up some kind of racks that do not require alternating the dies.
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I ordered some of the Lee 50 bmg trays mentioned for die storage, as I suspected from the pictures dies with lock nuts must be stored in alternating holes.

So setup the 9 wide way 4 dies would fit...

Can you fit 72 reloading dies which all have lock nuts ?

One thing I have thought about in regards to stuff like this is making sure to do a stress relief prior to any close tolerance machining. Some "movement" during heat treat IMHO is actually just due...

Personally to me the core seat die would be the easiest to make really. Even the person without a sunnen hone (almost all of us) can lap the hole straight enough that the working portion will be...

Agreed. The thickness of the lug is what determines if the lugs will be ripped off of the bolt I suppose. At 28-32 they would need to be some % thicker than say a remington 700 lug, exactly what % is...

One thing I remember from the multi part carbide die parts we made that were held in due cases is that part of the “body” would extend into the “nose section” if we were talking a point form die. So...

IMHO you could design an action that was safe made from 4140 pre heat treat, but your lug area will need to be larger than if the action was at 44-46 rockwell. The whole action might end up 25%...

I did a lot at one job with PCD inserts. Worked with a salesman from Clapp Dico.

PCD poly crystalline diamond is not supposed to be used on ferrous metals because the carbon in the ferrous metal...

They did some external turning of die cases that way at a prior employer. Seemed to work well, not as "nice" as grinding but a lot faster.

On the two piece design...I have thought about making...

Even cooler would be to do that tool with a CBN wafer on it that would allow hard turning after heat treat.

Yea they only way to know how it would act is to try it. The tool and die shop I worked at did a lot of medical implant parts made from TI and other exotic stuff. Some of it on Swiss turn machines....