Posted by Michael Bell on
URL: http://oldforum.flyshooter.com.au/6mm-Grendel-Improved-6mm-ProCal-tp5709226p5710586.html

G'day Shaun,
These are very good results....sounds like the difference between a "straight" Grendel & an improved version is about 100 fps!! Similar to a "straight" 6br vrs an BRX or Dasher??

All comes down to accuracy I guess.

Regards,
Belly