I think I jazzed up the 9.5x57 M-S a bit.So my experiences with the 270gr Hornady differ from those reported by others. My 1910 is a rifle with a 20" barrel, see photo, apparently a factory option. Granted, it is not in perfect condition externally, but I got it for free. An old friend salvaged it from the junkpile of a museum! and gave it to me, together with the barreled action of a M-S M1900. The pre-WW2 Zeiss Zielvier scope also was a present by a guy who did not need such an outmoded thing anymore. The claw-mount parts I found in my well-assorted junkbox. Well, I had to pay for the British sling many years ago in a small shop in London Southwark named Rigby's...
http://i1018.photobucket.com/albums/af303/kuduae/2010_01170002.jpg
It may not be a beauty anymore, but it works. I made my cases from W-W 30-06 brass, as these had most capacity. I load them with 270gr Hornady interlock roundnoses, still have 5 boxes in stock. Primer S&B lr. Powder charge 55gr VV N140, slowly dribbled in through a 6" funnel, a full capacity load, but not compressed. My Shooter's Chrony tells they are leaving at 2318fps. At this starting velocity the Hornadies surely open up on our smallish game, out to 160 meters, did not shoot farther yet. On roe deer they work almost too brutal, about like a .300 magnum load. Foxes are nearly blown up. They are perfect on boar, saving tracking time at less-than-perfect hits, providing a good blood spoor. In short, a near perfect hunting load for woods hunting in central Europe, providing plenty of reserve power. And, this is what the 9.5x57 was designed for a hundred years ago in 1910!