If you are happy with the accuracy of the current SMK load, why mess with success? If it is working, ride that horse. With summer coming on, here anyway, you should watch for a pressure increase due to rising temperatures. I haven't looked at your load and I don't know what the pressures would be approximately.
I am considering dropping my 7mm BR load down a bit instead of increasing the powder. Of course, it all depends on what you are using the gun and load for. I shoot at steel silhouettes out to 500 meters (547 yards approximately) with hopes of knocking down a 55 pound steel ram target. I load my 7mm BR according to what I need it to do for me and I also try to keep the recoil at a minimum.
Recoil is cumulative. It is like taking body punches in a Boxing Ring. Enough punches and the body begins to weaken. With a firearm, the same is true. You can continue to shoot but 100 rounds later, your concentration either diminishes or leaves you entirely if you are being gently punished. If you only shoot 20 rounds a trip, then you can be macho man and shoot heavy recoiling devices. I'm old and have a lot of shooting behind me. I'm hoping to have a lot in front of me.
You should balance the recoil with the need and use of the firearm at hand. No more or no less than what you need. Of course, there is always that "I want factor". If taking two aspirin, laying down and taking a nap doesn't cause that to go away, go for it.