There have been a couple that shot for a while in IBS I believe.
If I remember correctly they did not hold their own @ 200 yards in conditions, against PPC's with 65-68gr slugs.
One 20 VT was shot in 2015 in the IBS Nationals and the IBS Charity Classic. The average of all the groups (22) fired at 200 yards was 0.698 inches, per my arithmetic. The smallest was a "screamer" at 0.217 inches. That put the combination in the middle of the pack for both LV and HV (same rifle used), beating some seasoned experts and being beaten by others. This reflects one rifle with one barrel fired by the gentleman who built the rifle. Whether this constitutes holding its own - maybe. Maybe not. Check out the match results on the IBS site.