Could I ask what chrono' readings you were getting? Just tried my .177" with the rifle barrel and was getting 6.7ft/lbs with jsb heavy 10.35gn
This was my average readings. As you can see from the temperature it wasn't the best. But I was trying different pellet weights but a few times forgot to change the profile back to 7.4g from 8.4g
Victory CP2 long
Bullet:
Weight: 7.4 gr
Weather: 9.7°C 6.4mph clear sky 1025hPa/mbar 30.27inHg 64%
Shot count: 7
Low: 600
Hi: 615
Avg: 608
STD Dev: 4
Spread: 15
3/26/25 11:30:33 AM,606,FPS,6.0,FT Lbs,
3/26/25 11:31:39 AM,607,FPS,6.1,FT Lbs,
3/26/25 11:32:04 AM,610,FPS,6.1,FT Lbs,
3/26/25 11:32:16 AM,610,FPS,6.1,FT Lbs,
3/26/25 11:32:42 AM,615,FPS,6.2,FT Lbs,
3/26/25 11:33:13 AM,611,FPS,6.1,FT Lbs,
3/26/25 11:33:30 AM,600,FPS,5.9,FT Lbs,
When it warmed up a tad.
Victory CP2 long
Bullet:
Weight: 7.4 gr
Weather: 11.7°C 1.0mph clear sky 1024hPa/mbar 30.24inHg 76%
Shot count: 5
Low: 610
Hi: 641
Avg: 625
STD Dev: 11
Spread: 31
3/26/25 1:23:30 PM,641,FPS,6.8,FT Lbs,
3/26/25 1:23:45 PM,631,FPS,6.5,FT Lbs,
3/26/25 1:25:33 PM,621,FPS,6.3,FT Lbs,
3/26/25 1:25:47 PM,620,FPS,6.3,FT Lbs,
3/26/25 1:26:08 PM,610,FPS,6.1,FT Lbs,