Varmint Grenade style loads for .22-250?

Have used Barnes 36 grain g. in my .22-250 for chucks..did a fine job and accuracy was very good..used my fav. powder for the caliber H4895....also shot a few coyotes with the30 grain Berger in my .22-250 AI...did fine, but not a windy day load.....
 
I have had the 36grn Varmint Grenade up to 4890fps out of my 22.250 AI with case filling charges of Vit 550.
I was looking for 5000fps but pressure (blown Primers) stopped my quest.
Accuracy was poor, grouping 1.5" @ 100yds, even when i dropped velocities down a more sedate 3900fps accuracy did not improve.
Went back to my old mainstay the 52grn Berger Match Varmint.
I have now had enough of speed and mediocre accuracy so this particular rifle is currently being re-barreled to 22BR.

Ian.
 
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