Results 1 to 2 of 2

Thread: .243 OAL/Bullet seating depth.

  1. #1

    .243 OAL/Bullet seating depth.

    I'm trying to work a new load up for the .243 using Sierra 60gn hollow points. I've loaded a dummy round and kept seating the bullet until the bolt just closes. This gives an oal of 2.675 thou. A previous load with a 100gn btsp bullet gave good accuracy 15 thou off the lands so i've now seated the bullet in further to achieve this and have been left with a finished OAL of 2.660 thou. But the trimmed cases are 2.040 long and the bullets are 0.740 long so if i've done my sums correctly (2.040 + 0.740 = 2.780 - OAL of 2.660 = 120) the bullet is only seated a maximum of 120 thou. Modern reloading gives a minimum OAL of 2.600 so my question is, is 120 thou enought seating or should I seat the bullet deeper And if I do seat the bullet deper how is accuracy likely to be effected
    Thanks.

  2. #2
    i'm no expert, but a wise man once told me to seat my bullets the same depth as the calibre diameter, as a minimum, and that seating a precise distance of the lands not important.

    i just seat my bullets to obtain the COL's quoted in the specific data, and check that it is somewhere off the lands.

Similar Threads

  1. Bullet seating depth/OAL
    By JP in forum Ammunition, Reloading & Ballistics
    Replies: 6
    Last Post: 26-12-2009, 19:51
  2. Seating depth
    By ezzy6.5 in forum Ammunition, Reloading & Ballistics
    Replies: 5
    Last Post: 30-09-2009, 16:50
  3. Bullet seating depth?
    By RichardP in forum Ammunition, Reloading & Ballistics
    Replies: 15
    Last Post: 11-06-2009, 20:51
  4. .222 seating depth
    By clivecleaver in forum Ammunition, Reloading & Ballistics
    Replies: 9
    Last Post: 02-04-2009, 08:23
  5. Seating depth
    By sp4rkman in forum Ammunition, Reloading & Ballistics
    Replies: 4
    Last Post: 04-08-2008, 19:30

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •