I got my first bolt rifle and took it to Cali on a road trip, and now I'm back in PA, so I finally stuck my SF 300SPS on my 24" 6.5x47 and it was pretty amazing. Factory Lapua 139 scenar ammo. The brass looked clean upon ejection, just like shooting unsuppressed. The chamber looks like a polished, smooth, bright clean finish, so I don't see any carbon fouling after 600 rounds unsuppressed and 75 rounds suppressed. Recoil was reduced, and it was an absolute pleasure to shoot. I was laughing how quiet it was. I shot the last 25 rounds with no ear pro and my ears were totally fine. I usually ear plug and muff, but in the future I'll just plug up with this one.
14 suppressors in the my safe, and I shot my omega on a 18" 308 gasser, which is not a good comparison, but 300SPS wins, no surprise, due to the extra 6" of barrel as well as more volume on the SPS. Tone goes to the 300SPS as well, but again, not the best comparison.
My griffin armament Recce 7 on my 16" LWRC REPR has a great tone, and is amazing to shoot, but hurts the ears without ear pro. I lit one off without ears just to check it out. I need more time behind the Omega but I have a feeling the REPR/Recce7 has a better tone than the CA-10/Omega.
Overall, I'm very happy with the 300SPS and can't wait to get behind it again and start load development.
Scott