Driftwood Johnson, I'm going to remove the cylinder and reinstall and see if that helps.
I believe you misunderstood me.
The cylinder pin jumping forward is caused by heavy recoil. Shooting full power 44 Mags from a revolver with a 3 3/4" barrel could certainly qualify as heavy recoil. You will not see this happen unless the cylinder pin has jumped forward. Reinstalling the cylinder will not affect it, just look and see if the cylinder pin has jumped forward. If it has, push it back until it latches in place.
You can simulate this at home. Just unlatch the cylinder pin and pull it forward about 1/4" or 1/2" or so. With the pin forward, cock the hammer slowly and look down inside to see what is happening. You will see the transfer bar rising, but it will probably bump up against the underside of the frame mounted firing pin. This will make it difficult or impossible to fully cock the hammer. If you point the gun up while cocking the hammer, gravity will probably make the transfer bar fall back and the hammer will cock easily. If you point the gun down, the transfer bar will most probably be blocked by the firing pin. That's why there is a spring plunger at the rear of the cylinder pin, to shove the transfer bar back, clear of the firing pin, as it rises. If the cylinder pin has jumped forward, cocking the hammer will be difficult because the firing pin is at least partially blocking the transfer bar.
There are several solutions to this problem, but I will not list them until you have determined if your cylinder pin is jumping forward in recoil.
By the way, the same thing happens with Colts and Uberti single action revolvers. The latch can allow the pin to jump forward under recoil. With a Colt, there is no transfer bar, the pin simply keeps moving forward until it falls out of the gun and you are crawling around in the grass trying to find it. But usually the cylinder will bind up before that happens.