I shoot for fun and do not compete, but i still try to duplicate what the competing shooters are doing. I got a Rock Br and did some minor machining to tighten it up for a minor amount of dollars. Having access to a machine shop did help. I still thought i had to have a top notch brand. Luckily a friend got one and let me use it for a period of time. For me speed was better, but i really did not need speed. The groups that did matter, in the low 1's and 2's did not change. This was just my observation, not a scientific test.