I dont know about that offering of pr bullet but the strap wrench thing is ok ,as long as 60ft lbs is about all tbe torque required . Youll still need an internal lug wrench to do it . IMO heres a better , more user friendly way -- west texas ordnance switch barrel lug system . Youll need a gunsmith of good high quality workmanship to do it but it is no effort at all to use yourself. No strain , no fuss , if you can turn a screwdriver you can do it !!! It repeats accurately for your scope and its safe !!! Www. West texas ordnance .comhas anyone used one of the Prbullet conversions yet on the Ruger 77 or Remington 700 . Looks like all you need to switch barrels is a strap wrench and they will headspace your centerfire barrel to use. Pros-cons ?