44Magnum Winchester 94 question

I looked at a used Winchester 94 Trapper in .44 magnum today at a gun shop. It's one of the ones that came before that safety button in the reciever.
The rifling in the barrel looks something like Marlin's micro-groove rifling.
I've been told more than once that using lead bullets in a barrel with micro-goove rifling causes leading/accuracy problems.
I use mostly all 240 gr. HARD cast SWC loads with 20-22 gr of 2400 in my Redhawk and S&W 29. There IS leading but it's never too bad with these and it's mostly alll near the back of the barrel near the forcing cone. When I'm done shooting I just fire one or two rounds of jacketed bullets through it and that gets most all of it out.
I'd like to have a 44 mag lever action carbine that will do okay with hard cast lead bullets at magnum velocities.

Now the Quesion;
Is the rifling that Winchester uses on the 44 Trapper okay with lead bullets?

Thanks.
JS