I can't imagine how perceived recoil would be measureably different between the rifles that you listed.
Of course you realize that the AR15 is not available as a 308? It takes a AR10 to tango with the 308.
Folks put off by 308 Win recoil would do well to examine their rifle's fit and their position in relation to it.
Folks put off by 308 Win recoil would do well to examine their rifle's fit and their position in relation to it.
+1 Especially when you are using a gas gun like an M1a.
A .308 has the perfect amount of recoil. Enough to know you've been kissed, but not so much that it owes you flowers the next day.
You hold it like delicate glass, about an inch away from your collarbone, right?