Jim I will give you what I use in my .44-77.
I did not build this rifle for shooting matches it was build as a hunting rifle but I have shot it at long ranges past 1000 yards and it does very well.
This rifle is a Shiloh with a crescent buttplate and standard 32" light weight barrel that comes in under 10#. I have had a target front sight on this rifle just a copy or a original Sharps Hartford front blade but I did mount a scope on it and I also used a tang sight.
I took this rifle to the Cadillac midrange match one year and it did well holding 9 rind and 10 ring very good till that crescent buttplate bit me on the collarbone that drew blood. That was the last time I shot this rifle prone LOL. but I switched to the .45-90 to shoot the match.
I also shot this rifle before the match at Alma to see how this caliber and load knocked down the rams and they will lay down like THOR hit them with his hammer. I had a scope on this time and it gave me my first AAA score at the end using the scope.
I have several rifles in the .44 caliber. One CPA .44-75 Ballard with a 16 ROT The Shiloh .44-77 with the 1/19 ROT a .44-90 BN Shiloh with a 1/19 ROT, one .44-90 BN CPA with a 16 ROT and a .44-100 CPA with a 1/17 ROT as well a Shiloh .44-100 (20 lb rifle) with a 1/17 ROT.
The 1/19 ROT is a fine twist for the .44-77 but you want to avoid the elliptical s in this twist. They shoot well to midrange with the .44-77 but get squirely at the 600 yard Quigley target when the Montana winds start picking up, but it holds up very well using the .44-90 BN with the 1/19 ROT. The bullet I used was a KAL 1.462" long .432" diameter. I used this combination for the 2013 or 14 MT 1000 and did well using it but when the winds started picking up as the morning turned into the afternoon I had a problem using it in the 19 twist.
I normally use a 512 gr 1.400" long with the original ogive like the Metfort or Sharps profile. This 512 gr also stays stable to the 600 Q stop sign with the .44-77.
Here is my load data I use for all ranges too 1000 yards and even used it to shoot at 1585 yards and managed to hit a full sized iron buffalo using barrel sights at Rick's Range.

Cases are Jamison .44-77 and also Bell .44 basic 3.250" necked down.
The Jamison case holds 82 grains of the new 1.5 Swiss.
The bullet is a 485 gr of the original Sharps RN cast with a Brooks adjustable mould that he made from a bullet I sent him.
The bullet is 1.325" long .432" in diameter .485 gr. I use that bullet for everything because I have not found anything that shoots as well as it does.
I use 72 gr of 1.5 Swiss
Also 77 gr. of 2F OE with a Fed LR Match primer.
I also have shot a 405 gr .432" diameter 1.125 long with the original RN but it does not do as well as the .485 gr.
Forget the long nosed sleek money bullets in the 19 rot they will make you scratch your head wondering what the H......
They shoot very well in the 16 and 17 ROT bores.
The 1.462" .432 Dia 507 gr KAL is my go to bullet with the 16 and 17 ROT.
The 16 ROT does not shoot as well as the 17 ROT.
I also have a tapered KAL tapered Medford mould the shoots very good in all my .44's
If you need precipices ask...
You are also welcome to shoot my rifle but shoot it sitting

I also have a print drawn up for a new .44-77 I would like to put on a High Wall action. I have not sent it in yet because I keep saying....I don't need another rifle and I just don't eye to eye with C-Sharps.
Kurt