case neck turning

[josebd]

does this really help? i have a .223 and .243 i might try it on.

[jhalcott]

Why are you thinking about it? Are you shooting a tight neck chamber? Are you loading cheap brass or shooting various brands of brass?
  Neck turning CAN help ,IF, you have a tight chamber ,your brass is very off center, or has  some other physical problem.You have to be carefull not to make the necks to thin. I turned the necks on brass that was formed from another case and the resulting necks were to thick. Occassionally ,I'd get some cases that were thicker on one side than the other. Only remove enough brass to even out the thickness. Most of this type of brass was rejected and sold to the scrap yard though. If it was "heavy" on one side of the neck,chances are it was" heavy" all the way down!

[bigdaddytacp]

does this really help? i have a .223 and .243 i might try it on.

........As the other post states....IT DEPENDS......for MOST factory chambers and their loose tolerances it seldoms helps with decent brass......if your brass is badly varied in neck wall thickness then it will help to "clean up" the high spots.........most factory guns will respond to using good Lapua or Norma brass and play with the seating depth and good quality bullets more than neck turning..........this is from reading many articles and limited personal experience with a half dozen guns and calibers in accurate FACTORY chambers-guns..........a good neck wall thickness micrometer or sorting tool used to sort the cases into good wall concentricity seems to work as well or better than neck turning in factory chambers with "standard" sammi brass.......good luck and good shooting-loading!!!

[Duffy]

I've played around with neck turning mainly to even out the brass. Biggest problem I ran into was once it was even it often didn't size down enough for good bullet pull. I could have bought a collet die....and..on..and..on but in a standard factory chamber I don't think it would really pay off.

[unspellable]

I convert 9.3x74R brass to 400-360 by trimming and pushing the shoulder back.  This leaves the neck a bit too thick for the chamber so I have to thin the neck.  (Also have to shave the front side of the rim.)

I do this with an inside reamer for cosmetic reasons, although many say turning the outside of the neck produces better results.

[bgjohn]

I recently bought a custon handgun in 219 donalson Wasp. I received a set of dies and a quantity of brass with it. There was a note indicating that the gun was setup with a tight chamber and that neck turning might be in order. I loaded some mild loads and tried it on my Chrony. 2700 f/sec with a SD of 118 on the loads that were not turned. I then tried the neck turned cases and had a SD of only 52. The average velocity was nearly identical, only 12 f/sec diference. This was an eye opener to me. This had to improve the loads.
JM