The hot shot should work fine that is what I use with the Mag #11's. You got a good deal on the stock. Don't get in a big rush and your trigger and tang will be reasonable price. I hated the Hawken butt plate. I do like my limb saver on it now. I tried T7 but I didn't like it at all. I do like the pyrodex P a lot. The T7 was way too hot for my blood. I saw a friend of mine split his stock with 100 gr of T7 and a 410 gr Hornady great plains bullet.
As far as conicals go, the only way to go is make your own. Ron