woods, I have the almost same thing as you. I bought a used Redhawk couple weeks ago. Loaded up a bunch of 245,gc swc bullets using wlp primers. Last week the son-in-law and I went out to give it a try. Same thing as you. Shooting s/a with a steady slow squeeze the hammer would drop and just a light mark on the primer. Same thing shooting d/a. Son-in-law has a raging bull 44 mag and never had a prob using a slow squeeze. If I pulled the trigger fast s/a or d/a it would fire every time. Thought the prevous owner had cut the spring, but after checking it appears to be uncut. Thinking the same thing gonna have my gun smith give it the once over.
Gun Runner