Welcome Matt, my name is Matt as well. I have the 24" bull barrel and while I can't imagine wanting to cut it at all, if I were going to I wouldn't cut it short of 18". The reasoning is that the larger percentage of reviews and opinions I have seen for 18-20" barrels were almost entirely positive, while 16" barrels had a trend towards a few disappointed customers. Fluting looks awesome, but I think it would affect weight more than accuracy, and only slightly at that. In your shoes I would look into purchasing an 18" barrel and suitable gas block before throwing a well-designed long barrel into a lathe. Just my 2 cents worth.... ;)