I would say not 90%, but at least 75%.
I have a Model 94 30-30 AE that had open sights for 30+ years and scoped for last two, I bought a bolt action 308 six years after the 30-30 for slip hunting. My model 94 doesn't group like the 308 does, which limits its effective range more than it's trajectory does.
Yes but that 75% is based on your 16 inch trapper, which I kind of relate to about 44mag levels due to the shorter barrel. I was asking in relation to a 20 inch carbine.