Idgunner
Well-Known Member
I shoot a LOT. I have a pair of 223 varmint rifles that I go through 1000 rounds each every year during chuck season. The barrels are 8 twist which allows me to use 75g ELDM bullets. Those long bullets have the base seated below the case-shoulder junction, well below the neck shoulder junction where donuts form. I've known about donuts but looked at them like we all look at cancer, it will happen to someone else. Rude awakening while reloading some of my Lapua brass and having the seating process hit a hard spot where none existed before. I got donuts.
So, I started investigating the little devils to see what to do about them. Ignore them, ream them out from the inside or turn necks slightly into the neck shoulder junction. Ignoring them does not seem to be an option although I did try to back off the depth that my neck bushings resize the neck and that seemed to minimize the donut bump while seating the bullet. Have not tried those at the range yet and don't know if I will need a slightly smaller bushing to compensate for less neck tension because a shorter amount of neck is sized down.
I do not own the tools to turn the necks or to ream the inside and I'm hoping that someone here with experience with one or both can chime in. The LE Wilson inside the neck reamer says to use their reamer on fired unsized cases. It makes me wonder how that will clean out much of the donut without also thinning the case neck from the mouth down to the junction.
Neck turning apparently uses a mandrel to force the donut to the outside of the neck and then the cutter is set to lightly turn down the neck slightly into the junction. That would certainly seem to get more of the offending bulge gone. (at least that's my understanding)
So, who here has actual experience and advice with successful donut removal? Thanks in advance.
So, I started investigating the little devils to see what to do about them. Ignore them, ream them out from the inside or turn necks slightly into the neck shoulder junction. Ignoring them does not seem to be an option although I did try to back off the depth that my neck bushings resize the neck and that seemed to minimize the donut bump while seating the bullet. Have not tried those at the range yet and don't know if I will need a slightly smaller bushing to compensate for less neck tension because a shorter amount of neck is sized down.
I do not own the tools to turn the necks or to ream the inside and I'm hoping that someone here with experience with one or both can chime in. The LE Wilson inside the neck reamer says to use their reamer on fired unsized cases. It makes me wonder how that will clean out much of the donut without also thinning the case neck from the mouth down to the junction.
Neck turning apparently uses a mandrel to force the donut to the outside of the neck and then the cutter is set to lightly turn down the neck slightly into the junction. That would certainly seem to get more of the offending bulge gone. (at least that's my understanding)
So, who here has actual experience and advice with successful donut removal? Thanks in advance.