Here's another thought. Using NRA HP targets, permits syncing to a score book. The score book makes any shooting a more productive experience, as it helps the shooter evaluate performance, keep track of progress, and be aware of trends. Just shooting at sight-in targets to get a feel for the inherent accuracy of ammunition and rifle and/or to zero the rifle misses the opportunity to visualize and diagnose the most likely cause of shot misplacement, which is shooter error.
I do not like the Redfield Sight-In Target. I think it is a distraction to good shooting. It does not support the eye's natural ability to balance and center the reticle, it must be plumbed for best results, and it attracts the shooter's attention or focus from the reticle to the target. I see this sort of target as making it difficult to square the rifle and have muscular relaxation, and/or allow for the shooter to call the shot. In other words it invites shooter error and dissuades shooter/target analysis.