Sounds like this could be a mainspring issue. I am a Colt and Glock LEO Armorer and I have wrenched on a few guns in my time, so let me take a stab at this and there are likely forum members with much more BP experience that will hopefully chime in on this issue as well.
IIRC, I had a ROA brought to me with a similar problem. What I did was install a Ruger Vaquero mainspring. Again, IIRC, the ROA mainspring has something like 20 and the Ruger Vaquero has either 28 or 30 coils.
2MALSS, the Vaquero mainspring cured the problem and, IIRC, the struts are the same too, so this is a drop in repair.
Hope this helps...