Neither HKS 29-M nor Safariland will work in RH with factory wood grips.
Either cut the grips, or install aftermarket grips. Packmayr Presentation works for me. However HKS 29-M performs very poorly, they are difficult to align the rounds with the chambers. I bought a few and now they are all for sale. Going to try Safariland JS5.
The issue with HKS 29-M is that distance between the center of the loader and center of the loader chambers does not equal that of the cylinder and the rounds try to load at an angle.