thanks for the range report. I found out that the cost of this ammo is about the same as 50AE. it is a little longer then the 50AE and the 325 grn bullet is launched at about 150fps faster then the same bullet in a 50AE. I am not sure is this ammo is as availible as 50AE, commercially that is.
I can understand about the shoulder. I picked up a gel filled recoil pad for my shoulder, not one for the gun, that way I keep the look of the gun, and also when other people shoot it, they get the feel the real power behind it....that and I like to abuse other people.
I am assumeing you have a A2 upper from the sounds of it. I dont know if you plan on scoping it, if you do, I suggest a fixed power scope, preferably a Leupold. The variable power scopes can really get abused and break. I got this recommendation from Tromix. I put a fixed 6x on my Tromix 50AE and it is perfect.