The best replacement for gr is oz.

The best alternatives to gr are rated as following:
★★★★★  oz
★★★★  124 gr
★★★★  180 gr
★★★  147 gr
★★  x100s
★★  rx100
★★  230 gr
★  gd
★  fuji x100s
★  alt
★  gpx
★  sony rx100
★  140 gr
★  grd iv
★  125 gr broadheads
★  monette
★  165 gr
  158 gr
  fuji x20
  62 gr
  leica x2
  20 gr 17 hmr
  124gr

Your alternative for gr is not listed? Suggest!
Speaking about gr, one probably shouldn't forget about po.

Other search terms related to gr and their ratings are:
★★★★★ po
★★★★ reference to po
★★ ir
★★ inbound delivery
You have in mind a companion for gr and it is not yet here? Propose!



Google Trends

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gr
oz
124 gr