Drone - I am on firm ground with LeveRevolution, having used a few pounds of it in my Savage 1899 .30-30.
Larry Gibson did some serious work on Leverevolution in .30-30.
http://castboolits.gunloads.com/showthread.php?115657-LeveRevoltuion-Powder&highlight=LeveRevolution
Encouraged by Larry's work, I have been using LVR for my .30-30 hunting loads. My sweet spot is at about 2200 fps. Groups have averaged 2.7" for five shots at 100 metres. With lighter loads, velocity was more variable and groups not so good. Above 2200 (max 2300) groups opened up again. Barrel is 24".
I have deliberately stated this as velocity initially rather than charge, since my 175 gn bullets have a longer bearing surface (.600") than Larry's #311041 bullets, and require less powder. My load was 32 gns for 2180 - 2200. Larry's load was 34.5 gns for a little over 2200. This was with greased bullets in both instances. For the carbine you can probably interpret my "best" velocity as 2100 fps.
You can expect serious recoil from your carbine with these loads, and high POI.
If you don't like recoil, Lyman #311008 with 5 gns Unique (subsonic) is my most accurate load in a Marlin 336A Rippletop. This accuracy is maintained to 200 metres, though I can't speak for 300. Starting subsonic extends the accuracy reach of these light loads, and the short (115 gn) bullets do well at low velocity in 10 and 12 inch twists.