I mostly use equipment from SIG Sauer and Safariland, and my ammunition is reloaded on Dillon presses, using Reload Swiss powder and Ares projectiles. Full disclosure: Since 2015, I’ve been sponsored by Zero Mike Armory, the danish distributor of SIG Sauer, Reload Swiss and Ares. However, apart from the Reload Swiss powder and my SIG Sauer 1911, I’ve been using all these for several years before I was sponsored.
My equipment philosophy is quite clear: everything I use needs to be reliable. That is my primary concern when choosing equipment. For firearms, I also want good inherent accuracy, a good trigger, and sensible ergonomics.