is it an older Sendero or a newer one?
one generation of Sendero stocks had a standard, narrower palm swell - like a regular hunting rifle. or is it the
really fat oversized palm swell like the 700P?
whatever you do dont
ever try modifying an HS Precision stock (PSS, Sendero, etc): they have a very hard aramid fiber shell bonded to an aluminum bedding block, but
inside that shell is filled with something that looks like black expanding foam. my friend ruined his stock that way by trying to sand down the oversized palm swell on his LTR