Hello John,

here are some data on the 10,75x68 and the 400grs bullets:

- data copy of "RWS reloading handbook" issue 9
barrel length 60cm / 23.6"
bullet: RWS .423" FMJ RN (has only a thin metal jacket!)
powder Rottweil R902 max. load 61.0grs
obtained speed: 605 m/s // 1985 fps

my personal data from a custom built rifle with a 66cm barrel:

bullet: RWS .423" FMJ RN , OAL beyond the standard of 81,0mm
powder: Dynamit Nobel R902
displayed velocity: 637,7 m/s // 2092 fps
I found out later that the chronograph was overly optimistic and the reading should be reduced by around 20 m/s, which gives a realistic value of ca. 617 m/s / 2024 fps.

best regards
Rolf