I did load work, triggers and bedded around 8 or so 30-378 accumarks... the same load and 215gr Berger shot well in all of them, A few less 300 rums, and many 300 win mags.... the 215's did very well... Its hard not to like them... I only use the Hybrid Targets.... Don't fix it if it isn't broken... I have a cabinet full of bullets I bought to try and never used or just tried 10 out of a box and had to find something else... Some 30 years old..My Savage FCP 300 win was the only 30 cal magnum that didn't like the 215's it shot the old 208 amax's better...The 215's would be my first try in any 30 cal magnum rifle as a first try.. .