6 dasher lower velocity than expected

[Cwhitfill]

Just finished a 6dasher.
Defiance Ruckus, Hawk Hill 26 MTU, 1-8 twist.
Load: 32.4 gr of Varget , Berger 105 - .015 off lands.
Expected to see around 2950 FPS.
Don’t have a chronograph but dialing 2.7 mils for 500 yds with 100 yd zero.
StrelokPro app says this equates to 2850 FPS.

Shooting a 2” group at 500 so I’m not complaining just curious about velocity discrepancy.
Any help appreciated.

 

[Vaportrail22]

The barrel will speed up after 100-150 rounds. Maybe not 100 fps but probably more than 50 fps. This is normal.

 

[spife7980]

First think I would do is to borrow a chrono. It’s really the only way to know.

32.4 is a bunch of varget, I’d expect more like you were.