New guy here. I appreciate all the experience posted. I'll throw in my 2 cents worth.

I load a Speer 180g FP over 41.5g of IMR 3031 for 2400 fps in my 336C (20"). This is a PUBLISHED MAX LOAD from Speer's Reloading Manual Number 9. 40.5g gave 2375 fps. Still a great load with that bullet. You need 2300+ fps with the 180g FP for it to expand reliably. It's a tough bullet.

Thanks for the lively discussion and info.