I have not done a work-up on the heavies (220-240) grn. but I am doing (180 grn sierra) . N-320 6.2 grn. @ 1070 fps Vel. ,
I will be doing 220-240 grn pretty soon with 320 as my pre-loaded rounds get used-up that are done with A-#9 . Damn heavies are just getting way spendy-$$ for just plinking fun shooting, but really looking forward to dropping the #9 all together from my boltaction handloads.
for me 320 is less gas but it also gives a tighter Vel. ave. on the fps with the Chrony. readings than the #9 .
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