Quote:
Originally Posted by chuck
All I know is my fast twist factory rifle will shoot light bullets “under 1/2” all day”. 
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Hows your speed on that load ive done 2 243 win one 1/8 one 1/8.5 both shot all weights very well but could not find an acceptable load at upper ends of their pressure limits with 58g vmax
Same with the 22-250 1/9 i mentioned ealier.
All three fell short of the velocity id like by 150-200fps with light weights
All three acheived velocity and accuracy i was looking for with bullets on the heavy end of the spectrum
Many other factors may contribute to my results but im becoming more apt to rethink my thoughts of fast twist on everything.
I do have a 1/7.5 twist 6.5 barrel ill be chambering in 6.5x284 soon i will see how it likes the lightweights just for fun