I use bushing only on turned or very consistent necks anywhere from .002- .005 under loaded round dia depending on what target tells me it likesI remove the expander and then use one .002 under bullet diameter after the bushing. I find it best to use a bushing .004 below loaded neck diameter.
Yes, always good to test bushing size just to see if it changes.I use bushing only on turned or very consistent necks anywhere from .002- .005 under loaded round dia depending on what target tells me it likes
Would I be correct in assuming that you turn your brass? Perhaps the mandrel is only helpful if the neck thickness is inconsistent.Generally, with a bushing die, the last thing to touch my necks is the bushing. No buttons nor mandrels for me. I think in some cases there might be a benefit but overall, I think we're just moving the brass more to neck it down, only to expand it back up. The bullet is my mandrel, generally. Most runout issues originate from over working the case, especially the necks. How would I use .002 neck tension and get .004 runout, for example. Just an example and yes, there are other factors but I say that to make my point more than anything. That being, to move the brass as little as possible.
Actually, no..but I've done it in both. I've just migrated more and more to no turns after years of thinking I had to turn necks to be competitive. Perhaps if the brass is bad enough, it may show up but that brass has shown under .0005 out of round as well as piece to piece for several years and lot numbers. Come to think of it though...same with several cartridges. The only real common denominator is Lapua and I know some see different numbers with it. I posted some numbers on here maybe a year ago on the subject.Would I be correct in assuming that you turn your brass? Perhaps the mandrel is only helpful if the neck thickness is inconsistent.
Yessir. I mentioned this on here within the last day or so but I'll say it again here. Most runout issues happen during the sizing op, not the seating. I suggested the guy to check a fired case and then go down 1 bushing at a time to see where the runout showed up. It was straight, as fired but got crooked when sizing the neck. 30BR and a lot of people run pretty high neck tension on them. Haven't heard back yet but he was gonna try it.Runout can be caused by many things. You need to check your necks at each step to find where it being caused. Starting with a fired case. (I remove the expander ball). I found that Le Wilson Arbor press seating die was causing my runout. I can say its not the Arbor Press. But I tried many things to make the Le wilson die work. Maybe I got a bad one. I just decide to move on. Now my runout is .001 or less at near the tip of the bullet.
Haven't read your message on the subject. But its just my way of trouble shooting. As a electrician, in a industrial setting, we spent more time trouble shooting than doing actual electricial install. So first you need to verify if you have a straight chamber. and than just follow the process.Yessir. I mentioned this on here within the last day or so but I'll say it again here. Most runout issues happen during the sizing op, not the seating. I suggested the guy to check a fired case and then go down 1 bushing at a time to see where the runout showed up. It was straight, as fired but got crooked when sizing the neck. 30BR and a lot of people run pretty high neck tension on them. Haven't heard back yet but he was gonna try it.
This is what I do on virgin brass, to get a consistent (or more consistent) straight neck. Then I remove when sizing after firing. This is when bushings come into play obviouslyFor turned necks, no expander. For unturned necks, I replace the fixed expander with the floating carbide expander ball.