Hey Muttang did you try using any subsonic ammo I find they shoot really good through my 2 Brno's were the targets set up at 50m. What was the weather like on the day(windy)
Rabbit Boy
.17 Diana
.22 lr Brno Varminter
.22 mag Ruger Varminter
.223 Rem Varminter
.243 Rem
30.06 Rem