05-09-2020, 11:56 AM
Thanks Guys for the welcome and advise. I would agree with Tom that I am having some wobble or vibration in my set-up. I have fabricated an outboard leg for my fixture and purchased a new 4 flute carbide end mill. Haven't had the time to try it out yet, because it's below freezing here in the Pgh. area. Buy the way, Tom. Using a pc. of brass stock clamped in my vise, I was able to produce a hole about .3135 dia. following the same sequence of cuts with the same tools. Primer is .317/.318 O.D so this would result in proper press fit, I believe. Obviously, my vise offers more support than my fixture.
Let me take a pix of the fixture and post it (if I can figure posting out?) No one ever accused me of being smart so hopefully that won't be a problem. heh, heh. With regards to other comments. My boring head ends up being to long with fixture holding approx. 6" long brass case upside down. Run out of "Z" axis travel. Reamer is great idea except primer is sort of like a miniature upside down measuring cup so it requires a sq. corner in the bottom of the .233 deep hole. All reamers I've ever seem have a substantial chamfer on the leading end of the flutes. Primer must set solidly on bottom of pocket to cause ignition when firing pin strikes it.
Thanks again guys. Let me get a pix of this fixture contraption so everyone can have a good laugh to brighten your day. Later.
Don
Let me take a pix of the fixture and post it (if I can figure posting out?) No one ever accused me of being smart so hopefully that won't be a problem. heh, heh. With regards to other comments. My boring head ends up being to long with fixture holding approx. 6" long brass case upside down. Run out of "Z" axis travel. Reamer is great idea except primer is sort of like a miniature upside down measuring cup so it requires a sq. corner in the bottom of the .233 deep hole. All reamers I've ever seem have a substantial chamfer on the leading end of the flutes. Primer must set solidly on bottom of pocket to cause ignition when firing pin strikes it.
Thanks again guys. Let me get a pix of this fixture contraption so everyone can have a good laugh to brighten your day. Later.
Don