AR2078A round count without refilling?

Morning everyone,

Another question due to lack of experience or at least lack of practice. The CMP is having an air rifle match tomorrow in Anniston AL and I decided to give it a try. Not a long drive and should be fun plus it's an indoor match so the cold weather won't be such a problem. I'm going to shoot a Beeman ar2078A that I bought new about 6 weeks ago. I haven't been able to spend as much time practicing with it as I would like but I have it zeroed in nicely and am happy with how it shoots. The match will allow 75 minutes to shoot 60 rounds which is simple enough and it's all from a standing position. My question is this; will this rifle, using two new 12 mg cartridges, hold a zero or close to it for 60 rounds without having to put two new ones in? It's a little but clumsy to have to replace them quickly in this rifle and if it will hold zero for 60 rounds that would preferable. More time shooting and less time spent fooling with the rifle. I've shot centerfire matches before and learned that lesson quickly. I see no problem in my limited practice sessions being able to get 60 shots in 75 minutes, probably less than 45 but we'll see. I don't know anyone locally who does much air gun shooting so I'm making it up as I go. I suspect tomorrow will be educational. Thanks.

Rick H.