if yorue a bodybuilder you shoudl have no problem working with the 60s and 70s doing laterals,,it shoudlnt be a problem to do it right either,,,the reason many dont is because their shoulders are horrid because too much attention was given to their arms ...see any other canadian or american fella
in general ...90% of you take sustas or enantate 2-3 times a week with other goodies and should be able to work the 60-70s with zero problems
shoulders will only respond to heavy work asin heavy weight!