I'd say, $1,500 is a bit high to have that one made, maybe closer to $1,000...

In my .40, I shoot .390 balls, a .018 pillow ticking patch and my squirrel load is 25grs of FFF Goex...I used to use 35-40 grs but that makes a mess of the squirrel head and I filed the front sight down to shoot dead on with 25 grs...My max charge has been 70grs...

For a .36 caliber, I'd shoot a .350 ball, .018 ticking and 20-40 grs of FFF powder, depending on what you are shooting...If you are trying longer range groundhogs or coyotes you might want to go up to 50grs...Some will suggest a .355 ball but a very tight fit on these smaller calibers just isn't needed...

Size of patch won't matter as I cut at the muzzle with a sharp knife or at the loading block with scissors...

btw...The 1-48 rifling is proper for .36-.40 calibers and balls...These smaller calibers are a hoot to shoot and by making your own balls and keeping the charges down they are very cheap to shoot as well...Basically they are the .22 mags of muzzleloaders...