The 35 Whelen deveopes nearly 3400 lbs ME with a 225 grain bullet. Remington loads a 200 grain and 250 grain Corlokts for it. I have heard that Federal is going to drop the ammo for it but I can't swear to that. Its also handy that you can load the 357 pistol bullets in it for plinking. Sierra makes a 200 grain round nose and a 225 Grain BTSP.

I have one in the NEF Handi rifle. You can add some more punch to this one in the NEF by reaming it to 35 Hhelen AI.

Have not tried the Remington semi auto.