6.5 grendel sbr powder. Choices

[myrifle]

Use the 100 grain Partitions. Or maybe even the 120 Gold Dots! Monolithic Copper bullets out of a SBR Grendel are a crap shoot! You typically just can’t get enough velocity to guarantee their “advertised” performance, unless you’re talking at point blank range! The lead nose Partitons are a solid performer. The Gold Standard. If ain’t broke………..YMMV.

That's not even remotely correct on the all copper rounds.

I can name 2 that will expand nicely from the speeds that a short barrel can make.
1. Cavity back 105 mkz
2. Maker trex either 85, 95 or 110 grain.