I've no interest in single loading rounds, so the COAL length would be a no go from the start for me on the 270 specialty bullets. That 180 load is a pleasure to shoot from any position out of my 8.25lb rifle. YMMV.
Never said they'd be single loading just that different rifles allow for different mag length. I can't imagine the specialty .277 caliber bullets being that much longer or shorter than your 7mm's. YMMV
