I don't think it 'whispers'

[JFettig]

I have shot a couple of 50s, make sure to wear plugs and muffs. I dislike the muzzle blast much more than the recoil.
I've shot a Barret single shot and another AR lower mounted one that had a similar break to the one you have. I'd have to say that the barret break was much more comfortable to shoot.

Have fun!

Jon

[Colohunter]

I shot a Serbu 50 cal at the range one time. Between the weight of the rifle and the shark type break the recoil actually seemed just a little under my 30-06 that I was shooting that day. Have fun with it!