Thought it might be good to share our results with different ammo since there are a bunch of us with the same setup. I'm interested to hear what worked best for others.
<span style="text-decoration: underline">Ammo that extracted:</span>
CCI Subsonic -> shot ok, but was difficult closing the bolt (not recommended)
Eley Subsonic Xtra-Plus 40 gr. -> was a solid performer at 50 yards, made ragged holes. Groups weren't great at 100 yards.
Remington Target -> Groups weren't very good.
Federal Champion Target 40 gr.-> Small groups with the occasional flyer, a few FTE's
Federal Gold Medal Match (High Velocity 40gr.) -> produced some of the worst groups.
Fiocchi Match -> Small groups with the occasional flyer. Similar results to Champion (but no FTE's), but is 4x the cost.
<span style="font-style: italic">Best performance:</span>
RWS Target Rifle 40 gr. -> consistently gave ragged holes at 50 yards and groups around 1" at 100 yards.
<span style="font-style: italic">Decent lower cost performance:</span>
American Eagle high velocity 40 gr. -> I'd put it second place overall, after the RWS Match Rifle. Beat all of the other Match ammo.
<span style="text-decoration: underline">Ammo that caused FTE's:</span>
Winchester XPERT
PMC Moderator
CCI Blazer
Eley Sport
<span style="text-decoration: underline">Ammo that extracted:</span>
CCI Subsonic -> shot ok, but was difficult closing the bolt (not recommended)
Eley Subsonic Xtra-Plus 40 gr. -> was a solid performer at 50 yards, made ragged holes. Groups weren't great at 100 yards.
Remington Target -> Groups weren't very good.
Federal Champion Target 40 gr.-> Small groups with the occasional flyer, a few FTE's
Federal Gold Medal Match (High Velocity 40gr.) -> produced some of the worst groups.
Fiocchi Match -> Small groups with the occasional flyer. Similar results to Champion (but no FTE's), but is 4x the cost.
<span style="font-style: italic">Best performance:</span>
RWS Target Rifle 40 gr. -> consistently gave ragged holes at 50 yards and groups around 1" at 100 yards.
<span style="font-style: italic">Decent lower cost performance:</span>
American Eagle high velocity 40 gr. -> I'd put it second place overall, after the RWS Match Rifle. Beat all of the other Match ammo.
<span style="text-decoration: underline">Ammo that caused FTE's:</span>
Winchester XPERT
PMC Moderator
CCI Blazer
Eley Sport