I have been looking to buy a good amount of ammo to keep in the ammo suplies and have been researching prices. I am looking for it to run through my scar 17s and sig 716 but through both I have only run 168 gr ammo. I noticed some deals online for some lakecity bulk but it is 147gr. This isn't an issue for me but have read some people saying you have to play around with the gas regulator for the lighter 308 rouns sometimes. So my question is what in your opinion is the "ideal" battle rifle 308 round and how hard is tinkering with the gas system if it does shoot crappy on the light stuff.