If they are like there center fire rifles, run as fast as you can. I have tried every brand in my .308 with no use. First couple of shots will will be 4" or so and then they start flying. I have let it cool between. floated the barrel, put the rubber ring on the stud and to no avail. Even bought different scopes and bases. Maybe if it was a REAL good price then I might think about it. JMHO