So my BP is approximately one year old now. What's a range of weight he should be right now?

I currently have him housed in a 10 to 15 gallon tank, what's the size I should have him in at full-grown and can I move him into that now?

I've been feeding him what I think our jumbo mice from mice direct they might be large but I think Jumbo, once every five days, should I be shooting for 10 to 15% of his body weight still? Should I be switching to rats?