First off is it the first sendero or the sendero II? if it is first sendero and first vssf then snipercdountry had a good article a few months back about remmy triggers and how to adjust. the article can be found at www.snipercountry.com/Articls/RemingtonTriggers.asp
If they are the new black fluted barrels, I don't know, haven't had my hands on one yet, but they say they are different, don't know for sure.
Hope this helps.