The best replacement for 223 is 308.

The best alternatives to 223 are rated as following:
★★★★★  308
★★★★★  243
★★★★★  556
★★★★  22-250
★★★  22
★★  204
★★  22lr
★★  5.56
★★  270
★★  556 ammo
★★  7.62
★  308 ar
★  22 250
★  30-06
★  7.62x39
★  5.56 nato
★  6.8
★  300 blackout
★  556 nato
★  22 hornet
★  30-30
★  22-250 ballistics
★  308 ar 15
  556 cheaper
  308 rifle
  556 ar15
  243 recoil
  17 hmr
  556 brass
  6.5 grendel
  5.6
  308 caliber
  5.56 ammo
  224
  22 250 ballistics
  762x39
  762
  5.56 ballistics
  22 mag
  222
  .308 cartridges
  243 ballistics
  22 long rifle
  alesis sr 18
  7.62 x 39
  222 mag
  .308 which is better
  220 swift
  30 06
  17hmr
  5.56 bulk ammo
  308 shtf
  22 magnum
  204 ruger
  .204
  17
  6.8mm
  556 better
  6.8 mm
  nato
  357 magnum
  .556

Your alternative for 223 is not listed? Suggest!
Speaking about 223, one probably shouldn't forget about 1 in 9 twist.

Other search terms related to 223 and their ratings are:
★★★★★ 1 in 9 twist
★★ 1 in 12 twist
★ magnum primers
1 in 8 twist
1 in 14 twist
You have in mind a companion for 223 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of 223 in all years. Click on graph for more.
223
308
243