I use a lot of plated bullets, but not in the carbines. For those, I mostly shoot lead bullets, and I don't use 2400 at all, so I can't help you with loads.
I can offer some advice on loading plated bullets, though. Keep the velocities down around 1,250 fps maximum, or they will probably tumble. I've run some just a little above that in handguns and gotten away with it, but at 1,400 fps they tumble all over the place.
Use a minimal crimp, but good neck tension, so the magazine spring doesn't push the bullet back into the case and raise pressures and possibly lock up the rifle. Also use flat point bullets for any tubular fed rifle, since you don't want the point of the bullet bearing on the primer of the round above it, multiplied by 10 times, which I'm assuming is the magazine capacity of your rifle.
The Lyman 48th Edition Reloading Handbook lists some data for a 155 grain cast bullet of linotype using 2400. You would probably be ok using this data, if you stay on the low end, so you don't get the velocity up over the 1,250 fps mark in the longer carbine barrel.
Hope this helps.
Fred
