Not bashing your load but there are better on game performers out there.
I was with Kyle and Jeff back when Kyle had his first run of 275s done, we killed 6 deer with them one weekend. at that speed they are pretty explosive, great bullets but not really the best choice to push that fast.
Kyle has the 278 hard cores and 303 hard cores which are better on animal performers at high speed.
I think Hillbill was referring to the hard-core version of the same projectile. Pittman alters the weight so you can tell them apart. Example, regular core 275gr, hard core 278gr.
Regular core 300gr or 303gr hard core.
In my 40 cal that I carry during ml, I shoot a 300gr at 2800fps. They do a lot of damage. I stay away from good meat but occasionally take a shoulder shot. I've pretty much used up all my 300's so next year I'll be shooting hard core 303gr.
BTW, I've got a few 300gr 45's that I'll send if you want to try that H4895 load I told you about.
I run the 303 hard cores and Benchmark or 8208, in the 2900+ range, extremely accurate, clean, good temp insensitivity.
Lethal on Mr. bucky too.
I've used everything Kyle makes except a few of the lighter .40 calibers, all are good bullets.