3 supersonic loads tested today.

[Trikstr]

SSK 16.5" barrel
SSK reflex Suppressor

110 grn V-Max
18 grn IMR 4227
Rem 7 1/2
221 FB brass
OAL 2.110"
Avg 2018 fps
Ex Sprd 35
SD 14

125 grn TNT
18 grn IMR 4227
Rem 7 1/2
221 FB brass
OAL 2.134"
Avg 1953 fps
Ex Sprd 14
SD 7
3 shots recorded had to change printer paper.

110 grn Barnes Tac-X FB SBR
17.5 grn IMR 4227
Rem 7 1/2
OAL 2.155" roll crimp in bottom groove of bullet. Not much in case.
Avg 1967 fps
Ex Sprd 74
SD 27

V-Max and TNT shot fair, the Tac-X was a pattern.
All 3 loads can be increased for velocity.