How are you crimping them? Separate from seating the bullet?

Its doubtful that the group will improve by upping the velocity. What I would do is separate a hundred of the same headstamp and work with that batch for load development. Your probably at the bottom of the of velocity there so load ten at a time putting .1 grain more in every ten. Shoot each ten .rd batch from a rest (know anyone with a Ransom rest?) and use the load with the tightest group.

Sometimes you can sacrifice a little accuracy if substantially less recoil gives you more aim time....