As we were there as guests on the range, we of course had to abide by the house rules so to speak. We couldn't take photos of our recording setups on the range as we were the shooting was taking place on military base (and I didn't want to piss off a bunch of dudes with guns) so forgive the lack of pictures on this one. Also, we had to record the gun sounds in and amongst the normal itinerary of the shooting club; in other words, we could only record the guns going off en masse, and not individually catalogue each particular rifle in our recording process. However, as the various shooters began to disperse and head home as the day progressed, we were able to collect some more isolated recordings of gunshots towards the end of the session.
For the majority of the recordings, we used a pair of Line Audio CM3 cardioid mics with a Rode NTG1 shotgun mic going into the ZOOM F8. We set up the mics behind the line of shooters (we couldn't the impact sounds of the bullets hitting the metal targets for safety reasons) and experimented with various combinations of XY, ORTF and spaced mic pairings. On occasion, we also used a ZOOM H6 recorder with the proprietary shotgun mic attachment on occasion to capture the sounds of the blasts at a further distance from the main recording rig.
One problem we encountered during the recording session was that we didn't have the ability to consistently monitor what we pointing the mics at. Due to the ridiculously loud volume of the various rifles going off around us, I didn't want to risk removing my ear protection and damaging my hearing to listen to the incoming mic signals. While this decision helped preserve the structural integrity of my eardrums, it also meant that some of the recordings aren't amazing; listening back to a few of the audio files in Pro Tools today, some of the quieter gun shots sound muted and off-axis; problems which could have been easily avoided in a quieter recording environment.
A secondary problem is that there's also a lot of background chatter on the early recordings as the shooters are nattering away to each other in-between bullet barrages. Clever editing will no doubt help remove the bulk of the gabber, but as it's pretty consistent during the early hours of the session, a lot of this material might just be simply unusable...unless I ever need to do ambient sound design for a game/film scene set in a moderately busy outdoor gun range that is.
However, despite these flaws, I think that overall the recording session went pretty well, especially considering it was our first time operating the mighty ZOOM F8. I still need to go through and edit the recordings, but from a quick listen I think we've managed to grab some pretty useable stuff. Here's a short clip of a meaty .50 calibre rifle for posterity: