Ok, so I finally got around to running some brass through my resize die, and I did something vastly wrong. I ran the brass through a .284 expander button first, so I would be able to form a false shoulder for fire forming. Well, that went fine, then when I put the brass through my die, I couldn't feel the 6.5mm expander touch in the neck at all. Sure enough, the 6.5 bullets will just fall right through the neck.
I am guessing that the resize reamer walked when it was cutting the chamber. My process is below, perhaps you can tell me which part of my process sucks. I have a hunch I already know, but would like feedback. I am going to use a die blank with a precision pilot hole from Pacific Tool & Gauge for my next attmept.
Here is my process:
I first took some 1" 12L14 stock. I cut a piece off that was apporximately 1" longer than the die was to be. I center drilled one end, and chucked the other end (about 3/4" worth) in the 3-jaw. I then turned it down to .875" and then cut the groove and end of the die down to the minor diameter. I then threaded the section. Finally, I cut the unturned 1" off with a band saw.
I then took the basically exterior finished blank and chucked it in a 4-jaw with aluminum shims. I indicated this in to the minor diameter at the end of the die. I then re-touched the center with a center drill, and then ran a 1/4" drill through the entire length of the die. after starting the drill I re-checked the concentricity and it was good. I then ran a 15/64 chucking reamer through the die. At this point, I then chucked up a 5/16" bit and ran that about 1" into the end of the die. I then used a small boring bar, and enlarged the hole to .4xx just slightly smaller than the shoulder of my resizing reamer (I don't remember the exact measure at the moment). I then figured at this point, even though the hole through the die was larger than the pilot on my resize chambering reamer, that the initial hole that was bored would guide the reamer into the hole. I put the resize reamer into a Dave Manson floating reamer holder, and ran the reamer just past the benchmark on the reamer. I then faced the die end until the go gauge extended .142" past the end of the die.
Before starting this process, I made sure my tailstock was inline. I put a live center in the spindle and in the tailstock and after shimming a slight bit, they were dead nutz. Even with the tailstock indicated in, drill bits and the chucking reamers seemed to climb a tiny bit as they entered the die blank. I am wondering if I need to indicate the tailstock with the chuck in?
I am guessing the major problem is that I didn't have a proper pilot hole in the die blank, allowing the front of the reamer to walk a little during chambering?
Thanks for taking the time to read all that, and hopefully comment on where I went wrong.