Neck turn or inside ream?
I am preparing to convert some .308 Win cases to .30 BR. I do have some of the Remington BR brass, still in .308 form, not sure what the neck thickness on that will be but I am almost certain any formed from regular .308 will have a very thick neck.
I do have one of the sets for neck turning on the Lyman case trimmer, I played with it a few years ago and wasn't too pleased with the results.
The chamber cast I did before installing the barrel gives me a neck diameter of .332", so I have been thinking about the easiest/ best /cheapest way to do this operation.
So far the cheapest option is to learn how to make the Lyman unit work.
Next cheapest seems to be buying an inside neck reamer for a Forster case trimmer (I do have one of their trimmers).
Then we get into the Sinclair tools.
I have never had a tight necked chamber before, although I did run into this problem years ago when forming 7.65x53 from .30-06.
Looking for opinions, I'm not in a hurry on this build.
Robert
Lyman universal case trimmer - Neck Turning.
My Lyman Universal case trimmer, outside neck turner attachment works ok. I turn factory brass for factory chambers in 223, 243, 6.5CM. Turning attachment has been discontinued by Lyman.
If needing to remove a lot of brass, multiple passes will be needed.
Inside neck reaming should be done while neck is held in a die, for best results. None currently made that i know of?
So, ream, but leave enough brass to finish by outside neck turning.
All depends on how much brass needs removed?