Rifles from the same manufacturer make sense to me. I have tried different calibers and action types, a couple Browning's, a couple Ruger's, a Remington and even an old surplus Lee-Enfield. They were all "good" guns, and did what they were supposed to do, but they never quite fit me like I wanted. I tried a CZ 550 FS in 6.5x55 and things changed completely for me. The stock shape fit me better, my groups got smaller, and my confidence in my shooting abilities increased. I then went for a CZ 455 in .22 with the same stock shape and similar dimensions for cheaper shooting. The latest is another CZ 550, this time in 9.3x62, a considerable jump in power and recoil. Because of my previous experience with rifles from the same manufacturer and stock design, I immediately felt comfortable and shoot it really well. The fact that the safeties, magazine, and even the sling swivels (at least on the 550's) are the same makes for an easy swap when I change what game that I am going after on a particular hunt. For me, familiarity builds confidence, and my actions become second nature without having to think about which rifle I am carrying that day.