The first thing to be aware of is that they have the QLA muzzle. This is deep recess on the end of the barrel to make starting bullets easier. The problem is a lot, probably the majority of them are not perfectly concentric. Some bullets are more tolerant of this than others. Plastic sabots do not seem to care at all. Hollow based bullets varied, but the Hornady FPB worked really well in mine. Bore sized conicals seem to really hate this, and I mean so bad you can barely hit paper at 50 yards. It's possible you can get lucky, but there is a good chance you wont. If that's the case you can either choose to accept it, or you can remove the QLA muzzle. Cutting 1" of the barrel off, and recrowning will fix this, and they will then shoot anything well.
I'm going to assume you want to use it as-is. I found two loads that worked really well. My first choice was the 100 gr volume Blackhorn 209 and the 350gr Hornady FPB, along with the Federal 209A primer. I used that for a short while, even killed a buck with it. What ruined them for me was Hornady started having quality control issues with them. One pack the bullets would practically fall down the barrel, and then the next you really had to ram them down to fit. Hopefully they got that issue resolved by now, that was at least 5 years ago. The other load I liked was a Harvester crush rib sabot with a 255gr cast bullet and 80 gr BH 209 with a Federal 209A primer. The cast bullet was a Lee 452-252-swc sized .451".
Once I removed my QLA muzzle it shot pretty much anything at least acceptably, for sure good enough at 100 yards. It would then shoot the Hornady great plains bullet good, where it would not before. The last thing I loaded in that rifle was 120gr volume Fg blackpowder, 1/8" felt wad, TC Maxiball cast of pure lead bottom groove lubed with 50/50 beeswax and olive oil. Unfortunately the rifle has been in the safe now for a number of years. I should really take it out one day, it's a great rifle.
