Going to get a scope for my 700p but can't decide on power. I put a 4-16x50 temporary and its OK but would i need more if I want to goo 1000 yards. I glanced out the window with it and saw a bill board about a mile away but the cross hairs were thick and it covered most of the bill board. Would a ffp also cover the target if it is that far. Or should I just get a sfp scope and would over 20 power be to much