Ok, so do the Bullet Drop Comp scopes work.. Thinking about getting one to put on one of my rifles for long range shots at deer..I know my ballistics and don't see how one scope could fit so many calibers.. So what's the scoop are they worth it.. 300 yards is about where I draw the line with my current setups. Thesescopes have rings for up to 500 yards.. .And the bigger debate would be what gun to put them on?? What would you put the scope on????

Ruger MK77 in 22-250
Weatherby VGL in.243
Remington Model 7 in .243
Remington 600 in 6mm
Ruger Compact in 7mm-08
TC Encor in 308
H&R in 444 Marlin

I know the 22-250 and 444 are not really long range deer rifles.. But thought I would throw them in there for fun..