RE: 7mm. Rem Mag VS. .300 Win. Mag.....RECOIL????
Most rifle manufacturers 7mm and 300 WM rifles are using the same action, so this post assumes equal weight/design rifles.
The 300 win mag produces approx 500 ft/lbs more of KE. In general there is a price to be paid for that additional performance, even when the bullets are the same weight.The recoil relates more closely to the ft lbs of momentum generatedthan it does to the KE.
Soa 300 WMfiring a 150 grain bulletmay have similar recoil to a 7mm Rem mag with a 175 grain bullet even thought the WM has greater KE. However when you move to the 200+ grain end of the win mag ammo and then evaluate the two rifles there will be significantly more recoil in the 300 WM. This is even true when the KE values of the 150 and 200 grain bullets are equal.
IThe answer depends on what end of the bullet weight spectrum you are looking to use in each cartridge.