I'm still waiting on my Haymaker to arrive but I've already started reloading the 275 Barnes with Lil Gun behind it. I'm planning on using factory ammo to burn in and set grouping before I shoot the hand loads. I'm running the COAL at 2.26(max) and starting at 34.8 increasingly by .3 grains up to 36. The called out max is 35.4 . I've been told 36g should be no problem but ill check Every Load for signs of pressure.