Thank you for all of your help @Kubold. I finally have set up the IK’s correctly. At first I was having the hand_l IK to hand_r and just placed the IK where it needed to be, but this just seemed wrong as I had to disable that IK node in order to run the Reload animation. Now that I have the hand_l IK’ed to the ik_hand_l and the hand_r IK’ed to the ik_hand_r, the reload animation functions fine.
In the IK nodes, I had to have the Joint Target effector changed to Bone Space as well and point that towards the appropriate lowerarm bone, similar to what Neutronux said in his post. This makes the arms not all weird looking with the IK nodes.
Also, at first I tried adding a socket to ik_hand_r for the gun, but when I played the fire animation, the gun wouldn’t move or have any kind of recoil. So I just have the socket on the hand_r like normal and the gun moves fine now.
I’ll try setting up the relaxed rifle tonight with your suggestions for IK.