I have three .44 bn Shiloh's with a 19 twist and all three shoot very good as they are as long as I stay in the realm of bullets under 1.420 long. The .44-2-5/8-90 bn shoots quite well past the 1K. It has shown this at the MT 1000 a few years ago that I used that bullet. The .44-77 I use a 485 gr to 500 gr original profile bullet very good and it had downed two Bison's but I don't use that rifle for matches but it will reach past 1500 yards in fine shape. This makes me think a rifle in this caliber designed for match shooting with a faster twist so a heavy high BC PP bullet would do very well.
Some day I will use the hunting rifle and shoot a match with it with tang sights, but only in the sitting position for obvious reasons it has a crescent butt plate that does not work to well prone if you forget it has one.