I get along fine with the Old Model Rugers, which are close enough to Colt to feel normal to me.
Up through full 44 magnum loads with 240-250 grain bullets, I'll take the basic Colt 1860 Army grip every time.
After owning a half dozen New Model Blackhawks and Vaqueros over the years, I finally admitted the NM grip just does not work for me. These are a huge improvement for me.
https://www.thesixgunjournal.net/texas-grips-extended-single-action-revolver-grips/I can get along with Ruger's Bisley grip OK. IMO the best NM grip Ruger ever offered was on the Hunter series revolvers- a full Super Blackhawk grip with a rounded trigger guard.
Ronnie Wells offers a great selection of custom grip frames for the NM Rugers, if you are so inclined.
https://rwgripframes-com.3dcartstores.com/