Is that a sport pack? If so, I would charge at rate no more than 1C (1.3A) to ensure all 6 cells charge fully. You might want to invest in NiMH if you don't want to try Lipo. NiMH is easier to use especially for sport pack (shotgun setup).
I still have my side-by-sides I put together from pre-2000 that still works very well. 3 of my chassis have the sub-c cutouts so use NiCd's on them.
Those can handle much higher charge rate as I can balance the cells individually after use. For discharging I use the bulb discharger and don't know off hand what amp it was..but for sport packs be very careful on the discharging as you can't balance the cells. You might kill the the weak cell unknowingly.
