I owned a Winchester Model 70 XTR Sporter chambered for 270 Weatherby Magnum. My rifle liked the 150 gr. Partition loaded by Weatherby. My handloads were 72 gr. H4831 behind a Sierra 130 gr. SPBT. I also shot some of the 130 gr. ballistic tips with H4831. The 130's were very accurate. I didn't like there performance on deer. I had two of the B-tips blow up on shoulder shots at under 100 yards. I switched over to the 150 partition in handloaded form and this took care of the problem. The rest of my shoulder shots were complete pass thru's. I like taking a shoulder shot and putting the animal down on the spot.