I had to take the old barrel off my Savage 12 since the throat is too long for 55gr bullets,1-12 twist). OAL would have to be like 2.550 in order to get TO the lands. Should I have it rechambered in the same, or a different cartridge, considering the 1 in 12 issue. 22BR, 22 Dasher or 22-250AI? It's just a point blank target gun, or a 300 yard varmint slayer.