I bought another 5 ½” stainless .45 Blackhawk with the intention of converting it with Bisley parts. The 5 ½” stainless Bisley became available and I bought one and shelved the other project. I have tried the Bisley with a variety of grips and finally found some I like, but even with heavy loads, I don’t see enough advantage to get worked up about. I find with equal loads, there isn’t much difference and I prefer the Blackhawk grip and hammer.
It is strictly a matter of personal preference.