There have really been no significant improvements to hunting arms in the past 50 years at least some may even go back to the 7x57 and 30-06 .
R E A L L Y ?
When was the 308 W introd.?
When was the 7 RM introd.?
When was the 7-08 introd.?
When was the 260 R introd.?
et. al.
NOW, are you talking 'firearms' or cartridges or both?
Good firearms didn't cease to be manufactured in 1964 !
I have & have had rifles MUCH better than those made by...
1967......2017-50 = 1967 I'd really hate or despise being limited to rifles made BY 1967.
Jerry