Question on Neck Sizing

dcloco

March 04, 2006 17:44

Reloading for a 223 single shot, I loaded four groups of five rounds with 69 gr HPBT & four groups of five rounds of 40 gr BT's.

Necksizing allowed the 69 gr bullets to group nicely, compared to three other sets of full length sizing dies.

The 40 gr BT's liked two of the full length sizing dies.

Has anybody conducted similar testing?

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  gunnut505

  March 04, 2006 19:30

  So, I'm guessing you ran four separate series of 5 rounds with the same components through four separate sets of dies, with some of them being full-length dies set to full-length resize, and others set to only size the necks of loads, with 2 separate weight bullets, and want to know about full-length resizing versus neck only sizing?
  What's your overall length on the heavies?
  What rate of twist in your single shot?
  Were these the first time these cases were loaded?
  If you're shooting a Contender; you need only neck size and set the length to about 0.006" off the lands, case length is crucial as is a nice light crimp.

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  dcloco

  March 05, 2006 18:36

  quote:Originally posted by gunnut505
  So, I'm guessing you ran four separate series of 5 rounds with the same components through four separate sets of dies, with some of them being full-length dies set to full-length resize, and others set to only size the necks of loads, with 2 separate weight bullets, and want to know about full-length resizing versus neck only sizing? Yes
  
  What's your overall length on the heavies? Measured each bullet with a Stoney Point gauge, set 0.020 off the lands
  
  What rate of twist in your single shot? 1:9
  
  Were these the first time these cases were loaded? No, fired from this rifle
  
  If you're shooting a Contender; you need only neck size and set the length to about 0.006" off the lands, case length is crucial as is a nice light crimp.
  
  
  Rifle is a Savage model 12, large ring, bull barrel, single shot (no magazine).

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