I've shot the .505 Gibbs rather extensively by now, the video in this forum right now a few down from this thread is me working the custom .505 RSM at the end. To shooters experienced in .375 and up, frankly the recoil is a non-event. Very strong, but by no means objectionable or brutal. You do have to remember you're shooting a proper rifle or it will put you on your back foot, lean in, hold firm, focus on your target and fire. It will become within a couple rounds, just like any other gun, but as others have pointed out you do have to know your limitations, and I'd suggest it with no concerns to anyone who's been actively shooting and hunting a .375 for a few years or more with no issues. If when you shoulder it for the first time you brace for the bite and bark, you probably shouldn't pull the trigger, as you'll more than likely do a lot of harm to your shooting. Not many years ago, I've been afraid of a rifle before and it was a disaster that haunted me for a couple years on any rifle thereafter. So if you're ready to approach it as just another rifle and have lots of medium bore and up experience, dive right in there is nothing to fear.