I've used 535 and 570 grain Woodleighs in both PP and RNSP on Water Buffalo. All were awesome, meter plus penetration and the bullets expand to .9 inch plus. They look bloody ridiculous when you cut them out.

Can heartily recommend them, and choose which you prefer. Even though the 535 PP penetrate heaps and kill well, technically these have a lower than desirable SD. To me this is theoretical crap as the bullet did a great job on the buffalo.

Having said that the 570 grain Woodleigh penetrated better but killing power appeared equal to the 535. Having said that the 535's made the reputation of the big Jeffrey. The newer bullets and new (modern) powders can lift the beast considerably, your choice which way to go, but you won't fail if you stick to tried and true ballistics. A 535 grain at 2300 - 2400 fps your in good shape for anything.