If those SOCOMs will shoot at 2100fps using smokeless i will be thrilled. My GMB54 loves that bullet in a Harvester sabot and shoots as well or better than the 54x50 options. It was the first 54x45X combo that really impressed me and ive shot many 54cals with sabots. 54x50s have been my go to combination for years but mostly with 50-275gr Barnes Expander MZs before i started using BH209. It worked so well i didn't see a need for a heavier option and it expanded great at moderate speeds.

In the Lehighs i still prefer the 275gr-277gr 458s for 50cals. It has performed excellent on paper and media. Im pretty sure it would be devastating on deer to elk sized game. Using smokeless at 2300fps they would likely kill any North American big game.....If i can get them to shoot close to that fps without blowing a sabot it will be my go to bullet.

Im not recoil shy either, One of my favorites is a 325gr FTX at 2300fps (smokeless Savage) or 300gr+ bullets in my GMB54 with max loads of BH209. The little 6.5lb GMB has quite a bit of recoil with some loads. The 50-385gr Rem CLHP is a beast and way over kill for anything i hunt. I just wanted to see how well they would shoot and it took a max load to get tight groups.

Ive let a few friends shoot that load and none wanted a 2nd shot.