Sending156s
Well-Known Member
I like a lot about what you posted especially using mandrels. I've started using mandrels to set my neck tension. Using 21st century.Please read the following:
I own and use the Hornady Neck Turning Tool and I've found that after depriming the brass I tumble it in steel pin media,
Once the brass is clean and dried using a case dryer ( this neck turning procedure is for new or once fired brass shell casings only ) I will FL resize without the bushing inserted in my match grade die set.
Next and this is very important in order to have my cases fit over the Hornady neck turning mandrel I expand the case necks ID by .+001. This is accomplished using the Sinclair Gen 2 expander die with the correct Caliber Specific Sinclair mandrel. ( Sinclair makes these mandrels in + or -.001" increments )
Once you have expanded your case necks ID to a constant size you will find that your cases will easily fit over the Hornady tool's mandrel. Additionally, you will achieve a uniform neck turn,
Typically a -.0002" - a .0005" will true up your case necks OD.
Another note:
Please lubricate your brass before neck turning. I use a small container filled with Mobil 1 5-20 weight oil for neck turning, as brass is very gummy by nature and will gall if not lubricated. For this, I use a small acid brush.
You will have two different carbide turning tools one with a 20 degree and another with a 30-degree angle so you must decide beforehand which cutter you will need.
As this tool is used under the power of a drill and because of tolerance issues you must use the Hornady shell holder again caliber specific.
Other brands of shell holders will not work and most people don't have access to a lathe in order to modify them.
The beauty of the Hornady LNL Neck Turning Tool is that your hands will not get tired because you are using a cordless drill as they would when just using a handheld neck turning tool. You will be amazed at just how smooth and even your case necks will become after neck turning under power.
Next, I will wipe my brass clean the anneal them.
After annealing, I will FL resize my brass using my match grade die and this time I will insert my neck bushing.
This will allow a uniform neck tension which is crucial in establishing a constant bullet jump.
Finally, I will trim to the correct case length, chamfer the ID, and OD, then using my Redding body die and the correct Redding Competition Shell Holder Set bump my cases shoulder -.002" and seat primers, then fill using the correct powder in the correct increment and finally allow for the correct seating depth and jump factor, seat the bullet.
Once assembled I will check and adjust my bullets TIR as needed.
Factory ammunition has an accepted total bullet runout of .003". .I strive to maintain a + -.0005" TIR
In fact, I subscribe to the circle, within a circle within a circle theory.
I know that this is a lengthy dissertation but I hope that this will guide you.
OBTW This tool must be bolted down to be used correctly making certain to leave enough clearance to swing your drill-down for use.
Perhaps a lot of this information you already know but in the event that you do not, I've taken the liberty of reposting it.
Hope this will help as well as give you some food for thought.
have you tried 21st century neck turning lathe. I think it allows all to center better.
have a great evening!