I would like to shoot a carbine course at Sig one day hopefully. I've always shot 69 SMKs but I am not gonna waste them on a course, and I was just gonna grab a bunch of cheap 55 gr bullets. I have been using Varget for years. Rather than have to buy another powder like Benchmark, I'd rather not have to go that route and just use what I have. Any of you guys choose to run Varget with lighter projectiles like the 55s in your AR?