savagedasher said:
My reloading books show it takes 12% more of RL 22 to match the speed I was getting out of my 260 AI Nosler say that is near max.
Nosler manual 26'' barrel 140 gr RL22 max is 52.5 2925
My 260 AI with 30'' barrel 47.2 gr RL 22 was 3020 FPS
That is 11% . My math can be bad but 47.2 plus 11% is 52.292 Larry
It is a 6.5 284 Norma it is the most accurate tested the speed that it was the most accurate at was 2761 Twist the number any way you want A 6.5 284 is 11% over bore . Larry
May I assume that comment "Nosler manual 26'' barrel 140 gr RL22 max is 52.5 2925" is for 284 Win?
That's pitiful. Either RL-22 is a poor choice for 284 Win, or Nosler's data are suspect. Hodgdon report 3079 fps max from H4350 from only a
24" barrel! That's ~150 fps faster, from 2 inches less barrel.
For further consideration:
Terry Cross over on 6mmBR reported his 260 AI with 48.5 grains of H4831 produced 2935 fps. from a 139gr bullet from a
26" barrel.
http://www.6mmbr.com/gunweek046.html