Reducing draw calls in simple geometry based game

I’ve been playing around with UE4 on a prototype using just simple geometry and no textures. At the moment the scene consists of just a box brush for a bg (colored red), a plane shape for a ship (from the sample resources), and bullets that are fired from said ship (also using same plane mesh). While at the moment there’s not a terribly high number of draw calls, it’s apparent that the more bullets on screen the more the count will increase by a proportionate amount. So on that note, how would I go about batching things in a situation like this to reduce overall draw count? This is mostly a learning exercise so that I’ll be starting off on the right foot using best practices once I’m done prototyping. It’s a C++ game started from the twin stick shooter template and it spawns bullets using World->SpawnActor.