Free: Contests & Raffles.
From what I understand the 1:48" doesn't give a sabot enough spin to stabilize the bullet. Yes your bullet is going down range but who knows where it is really going. If your gun doesn't hit damn near the same spot every time you shoot then something is wrong. If I where you I would stick with the conical s. I'm sure T/C did a bunch of testing. Let them figure out where to start from and listen to them. If they say the gun doesn't shoot sabot's very well then don't shoot sabot's.
I don't know how twist and sabots are linked. As far as I know there should not be any link between them. With that slow of a twist if you are shooting heavy bullets they won't stabilize. What you most likely need to do is shoot a lighter bullet. Like 300grs or less. But I'm not even sure if they make sabots's that weigh much more than that. So if your shooting 300gr sabot's or less already. You have something else that is wrong. I would check all your screws first and make sure everything is tight, then I would take a look at the barrel and make sure that it looks good. If all of that checks out ok. Then it might be as easy as your gun doesn't shoot sabots well and you need to change to something else.
You get just one shot. You're cold, or worse. Your rifle is cold. Which ammo fires best for ONE SHOT ONLY! I've got a friend with a T/C Hawkin. I'm not sure the twist rate. Neither is he. But he shoots powerbelts with deadly accuracy. My T/C NW Explorer is supposed to shoot conicals well with it's 1/48 twist. Even though it's not supposed to shoot sabots well, I nailed a 100 yard bulls-eye, first shot, with a T/C XTP bullet with sabot. Then I couldn't hit it again!
After I neglected my 1:48 .50 cal Hawken barrel, I put on a Green Mountain Long Range Hunter barrel with a 1:28 twist. That is a conical and sabot shooting tube for certain. The heavier/longer the bullet, the more it seems to like them. Recoil can get a little rugged when stuffing cast boolits in the 450 grain range ahead of a full 120 grain charge, though.
My T/C Blackdiamond shoots much different clean vs. dirty. At 100yds there is a 4-6" difference. So what I do is before I go up for the season, I will shoot once to make sure the barrell is slightly dirty before hunting. (And no I don't do it where I plan on hunting, I do it at the range) Otherwise if I wanted a "clean" group I'd have to shoot it once. Go home clean it, come back shoot it again, go home and clean it come back shoot it again, and then check my three shot group and make an adjustment. So its not so much a difference between a cold vs hot gun its a dirty vs clean gun thing.