6.5 vs 308 Win

[bwaites]

I have just returned from a 15 day wild pig hunt with my boys (men actually ) 34 &41 years old, we shot 98 pigs, mostly big bores. i have a grendel bolt gun built from a ruger 77mk2 7.62x 39. & using 100g nozler ballistic tips & 28g of bench mark.
shot a number of pigs with it, other rifles used were 3- 308 win,1- 350 rem mag,1- 444 marlin &1- 6.5x 55. this hunt is a yearly family event in western Queensland Australia, we have shot about about 1200 pigs over 15 years on that property . and a lot more on cape york over the years.
How does does the 6.5 grendel compare to the 308 win ?. on big bores at similar ranges 30 meters to 250 meters. Not very well in my opinion. ! easy to shoot less recoil ect , but does not the same knock down power as a 165g 308 especially with a badly placed shot. reality is as much as you try in the real world of pig hunting some times you screw up.
Heaver 6.5 projectiles say 120 g would be better but they intrude into the case & compress the powder . A 140g 6.5 out of a 6.5x55 leaves it for dead.
The grendel is fun to shoot, easier on your shoulder, not as loud, only burns about 28g of propellent but its not in the same class as a 308 win on killing pigs.I will try to post some photos.
As a vietnam veteran i can say the grendel is much better than than a 55g 223.The Australian army used the both the M16 5.56 & 7.62 nato in the FN FAL rifle in that conflict.

I wouldn't expect 100 grain Nosler BT's to compare with 165 grain .308 bullets. However, shoot 100 or 120 grain Barnes or a similar tough bullet and see what happens. The BT is a very accurate bullet, but plenty of people think that they are not constructed heavily enough for deer, much less pigs. Shooting a big boar with a 100 grain Nosler BT seems a little less effective than optimal.