Figured I would start a new topic that isn't cluttered with I'll take one comments. Feel free to add any questions or comment anyone might have.

I got his book over the weekend and read thru it. One question I had was the ball mill used to recut the receiver opening. Why 5 deg? I always used 9 deg, any advantange one way or the other? Who supplies the custom cutter? With the book out I bet several people will be looking.
Don

I had been told it was 8deg. How in the hell would you measure an original one any more accurately anyway?

Jim

[QUOTE]Originally posted by Don Markey:
Figured I would start a new topic that isn't cluttered with I'll take one comments. Feel free to add any questions or comment anyone might have.

I got his book over the weekend and read thru it. One question I had was the ball mill used to recut the receiver opening. Why 5 deg?

I always used 9 deg, any advantange one way or



the other? Who supplies the custom cutter? With the book out I bet several people will be looking.

Don:

I don't really thilnk the ammo will know the differfence. Winchester used a straight ball end mill.

A taper is to start the "squeeze chute" idea I like to end up with about a 3/8" ball end. In my MSC catalog, a 3/8" 5 degree carbide is $127.00.

A 9 degree is not even avcailable (from MSC anyway)...but a 7 degree with a 3/8" ball comes in at $272.00.

But...heck...the booklet is only meant to be a guide..3,5,7,9 degree...OK by me!

Duane, I just use a standard 3/8" ball in and put the receiver in a sine vice. But a custom mill sounds easier to set up. Thanks for the input I was recomended between 8-10 degrees and just picked the middle. Good writing by the way.
Don

I thought you experienced 'smiths did things by eye -- 'looks about right from here ' !

I must have missed the link to buy a copy.

And to hell with that By eye crap. I trust my math more then i do my vision.