I like the Rem pumps. Have a 7600 carbine in '06 now, but have owned several of the Rem pumps and autos over the years. The Benoits use Rem pumps exclusively and they are the most successful deer hunting family out there.
I have not used your Churchill, but if it is leaving a dent in the primer the firing pin/striker is probably not broken. So the spring is either fouled and gummed up, or too weak. Easiest fix to try will be changing out the original (import) spring with one by a reputable company, Wolff.