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Rick,
One would have thought that with a pistol of this nature that T/C would have put a rear sight on with finer click adjustments than that ! !
???????????? Ben
Yeah, one would think but t'aint so. IHMSA had a rule on production guns where you had to use factory installed sights and even though silhouette shooters literally made TC what it became they completely ignored shooters all over the country screaming for decent sights. It lead to big sales of guns such as the RPM XL, MOA and BF because even though much more expensive guns they offered decent sights on them right from the factory. The sights on your TC in calibers such as 7TCU at 200 meters if you were under the ram target & came up one click you were over the next target on the next shot. That's a good 15 inches POI for one click adjustment. Now consider some of the 200 meter shoot-off targets are about the size of a pack of cigarettes and 15 inches per click.
Later on in NRA silhouette they changed the production gun rule to allow any aftermarket sight that would bolt to the gun without modification of sight or gun. IHMSA later followed suit. Bo-Mar accommodated many of popular guns but sadly Bo-Mar is no more.
Count the number of clicks on your sight in one complete turn, should be 12 clicks if it's a later TC sight. I think there were earlier sights with 9 clicks per turn, even worse.