Well, did some shimming on that front base, have no shim stock so, I used aluminum foil From the kitchen…..worked ok, set the bore sighter in the muzzle and, kept shimming till all was centered. Total height was .325 everything was center…….great. Off to the range, first shot was windage left @ 3.250” Elevation @2.125” and, elevation center. high. Moved the reticle to the impact hole (while still aiming at original point) Second shot was ¾”left Another adjustment and….yes right on with 5 shots touching, center of scope is very good, lots of adjustment both elevation and windage. Bart, I’m sure the “C” base will work fine, I don’t want to leave the shims there as on hot days and, dissimilar metals could prove problematic. I’m a happy shooter.
By the way range was 100 yards.