K i did my first REAL efficiency test today
Back bottle Phantom (unregulated) BRAND NEW HASNT SEEN 100 ROUNDS THROUGH IT
SSC polished bolt
SSC freak bored barrel 11'
.682 insert (the paint was my only non controllable factor as its really old and a mid-grade quality)
Conditions (i have a weather thing in my house)
Temperature 64 degrees
I paused for about 15 seconds between each shot.
I consider any shot over 250 to be a "usable shot"