I've used the Saker and Harvester from SilencerCo, not the Omega, but it looks like a very good choice. I've also used one from Griffen Armament that's rated for 338 Lapua, but it spends more time on a 260 Rem. I recently got an Ultra 7 from Thunder Beast and of the cans I've used, the Ultra 7 is my favorite. IMO, don't get one rated specific to the 308, get one rated for 30 caliber magnums and then you have a lot of choices how you use it.