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Rambler, using my 12" Noveske barrel and a QSM can with 220 MK's and WCC820 powder I got 1020 fps with 8.4 grains, 1040 fps with 8.7 grains, and 1120 fps with 9.3 grains. This is the strange part. My 16" Noveske barrel using the same powder, bullet, and suppressor shot slower with the same charge. I got 930 fps with 8.4 grains, 995 fps with 8.7 grains, and 1080 fps with 9.3 grains. Since it was my first try with this powder I only shot 1 or 2 shots of each. I will shoot 5 each next time for a better average. With regards to the PM I sent about the buffalo, subsonic Whisper will indeed kill a buffalo. We shot 2 cows that weighed about 1000 lbs (not full grown) that my friend raised. We used 220 Nosler Partitions. Both had to be shot twice because we both shot simultaneously at an agreed location between the eyes, which on a buffalo is sinuses. A follow up shot higher on the head dropped them like a rock. Live and learn, but a sub will absolutely drop a buffalo in one shot if a rookie isn't running the gun. We still have the heads, but I haven't recovered the bullets.
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