Gun Control & RKBA

.................Rifle Weight-- Recoil energy -- Recoil velocity

.223 Rem. (45 at 3500) ... 8.5 ..2.6.. 4.5
.223 Rem. (55 at 3200) ...8.0 ..3.2.. 5.1
.223 Rem. (62 at 3025) ...7.0 ..3.9.. 6.0

.30-06 Spfd. (150 at 2910) 8.0.. 17.6.. 11.9
.30-06 Spfd. (165 at 2900) 8.0.. 20.1.. 12.7
.30-06 Spfd. (180 at 2700) 8.0.. 20.3.. 12.8
http://www.chuckhawks.com/recoil_table.htm

If that's the bullet you are referring to (150 - 180 grains), quite a bit more recoil.

re the term 'assault rifle': howsoever it evolved, somewhen it has become a political term used today to mainly define rifles with a high muzzle velocity which often have an automatic rifle equivalent in the military {AR15 to M16, AK47, 74}, and which can often be converted back from civilian semi-auto to full automatic by use of a conversion kit or sometimes a simple tool such as a file (not that many assault rifle owners do this, it would be counter productive, just that the capability exists).