Now that where it get tricky it all depends as you can never be your best shooting different gun's for different events now I don't mean you cant be good it just with a combo your shooting the same stock using the same trigger to preform in these events, now with 2 different guns you have 2 different trigger pulls as one may have a faster hammer fall ,they have different balance and other things as well as the stock wont be the same , and if it only cost you one target before you adjust to the different gun that one too many as you can never get that target back why do you think the best in the world shoot combo it so they don't have a adjustment each time they shoot. I used to shoot 2 different guns and did well with them but just the mental aspect of knowing I am shooting the same gun ,same stock same balance and the same trigger is huge as it all mental and when things are the same it really help your mental game from knowing it. but some time price comes into play so shoot what you can afford to shoot and have fun.I shoot a single barrel for caps and singles and a different gun for doubles. They do what they are designed for and I see no reason that a combo would be better. Both guns fit me very well and I just hate to change something that works pretty well for me. I have tried shooting the combo and the dedicated doubles gun wins out every time.