So how much runout in inches are getting with this method.

How do you square a die?

Tom

My thoughts Exactly

The theory was that the threads in your press is too course, so when you tighten down the lock down ring, your sizing and seating dies will not be perpendicular to the shell holder.

So, gun writers have wrote articles telling folks they need to square them. They offer no data on runout before and after, but it gives them something to write about. You basically raise the ram until it touches the bottom of your sizer and lock down your ring. For seaters, you put in a shim to touch the bottom of your sizer and then lock down your seater. The shim has to be square. I got a machinist friend to make me a shim that is flat within .0005". Shell holders themselves probably don't meet .001" spec. So go figure.

I find it makes littlerly no difference whatsoever. But I still do it. One of those things that won't hurt anything.

So you pull off .25MOA out of all your guns? Thats impressive. I can't say I have one gun that consistently every time pulls off .25MOA. But your doing it for all guns?

Actually I'm minute of a deer with the .06 and 243. And minute of a PDog with the 17 Rem. All with-out square dies, and running out of Run-Out.

Well, I suppose this thread on precision probably won't interest you if all you want is to hit a deer.

When I was seeking knowledge when first starting to reload, I faced simular comments. The mediocrity rather irked me. Folks that have been reloading for 30years, and didn't see a need to ever shoot better than 2MOA. They never learned if they could get better and never cared. But for some odd reason, they cared greatly that I cared. When I started, there wasn't internet sources. Just chit chat at the local store, or sierra line, or RCBS help line.

I myself do not want to go to these lengths to get precision ammo, but I say kudos to those that do. You may never need that accuracy or care, but nothing wrong with understanding what is going on. Nothing wrong with being happy with min of deer as you say. Everybody has a want for reloading ammo.

.002 to .001 Good luck.

I would have to say that your method is a little more tedious and time consuming. Especially if you have a lot of brass.

Expand the neck, turn the neck, and resize. Not sure about the inside process but I would imagine it is just as time consuming when you are doing a few hundred brass.