50 rounds through a 404 Jeffery is probably past my tolerance. My humble admiration to you. These days I don't put more than 20 rounds down range from my 500 Jeffery in a session. I have other rifles I shoot more volume through. I practice offhand, kneeling and sitting with the 500 (I have taken a cow elk at 200 plus yards with it sitting). I don't shoot it from the bench unless I've taken the scope off (Talley QR rings) and then it's usually no more than a 1/4" off so three shots are all I need from the bench. Except from the bench, my shooting technique (or lack thereof) is the same with a 270 as a 375 or a 500 (except I don't shoot the 500 prone).