M4 Feed Ramps & Whisper
 

I'd like peoples observations on if carbines chambered for the .300 Whisper work better with M4 feed ramps or with the stadard profile ramps when shooting the heavier 200+ gr bullets.

I've used both without issues, but I would think the M4 ramps would give the round slightly more room to straighten itself out during feeding. M4 ramps are really just an edge break. Magazines have a bigger effect. Magpul Pmags and M4 ramps and you should be good to go using heavies.