Lapua .308 is a little heavier, holds less powder, gets to pressure with less powder.
177.0 grain case, holds 55.85 grains H2O.
You don't have to load them all hot to be useful.
---- 155-gr -----------------
Duplicate the Lapua Palma Match ammunition with
155-gr Lapua Scenar BC = 0.508)
Lapua brass
45.2-gr Varget, RL-15 or N140
44.0 gr IMR-4895
Federal 210 Match or CCI BR-2 primer
2.80 inches ( regulation )
2,825 FPS in a 600mm / 24 inch barrel
45.6 gr IMR-4895 in a strong match gun, same brass and primers will get 2,900 to 3,000, depending on barrel length. I am not advising you to play around up there
But put a 150-gr Hornady SST or Sierra GK in there in place of the 155, drop the load a bit, because the 155 Palma has less friction by far.
----- Light load ------------------------
You don't need to hot-rod the light bullets to get performance. They are not made for hunting up close, anyway.
44.0 gr of 4895 will run a 125-gr Sierra or Nosler BT at 3,000 fps.
42.5 gr is better, a 200 yard match load for the M1A, at about 2,800 fps.
125gr BT, 45.2 VV-N140, Lapua case, 2.850", Rem #9.5 primer, 2810 FPS
125gr BT, 45.4 gr IMR 4895, Lapua case, 2.845", 210M primer, 2924 FPS
------ 150 gr -----------------------
Lapua again, CCI 200, Fed 210, Rem 9.5 primer
150-gr Sierra GK, 43.5 gr IMR-4895 (very accurate)
If you can, try seating it out to 3.00 or 3.05 and go up to 45.0 gr.
------ 165 or 168 --------------------
168-gr Sierra MK ( or Sierra or Hornady or Nosler 165 )
41.0 grains if IMR-4895
or
41.5 gr VV N-140
Lapua brass
Federal 210M primer