Hornady Superformance ammo shoots pretty well in an A bolt I know, its just better than 0.75 inch at 100m. And 1 inch at 200m.
Im replicating performance with handloads of 130gr SST's (although im not a fan of SST's).
150gr are getting a bit heavy for 400m+ shots.
Come to think of it the Hornady Custom ammo shot very well for him but im not sure you can get it anymore
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