I am the most casual of casual shooters and almost always bring a .22 rifle to the range with ammunition proven to be accurate in that rifle to warm up with prior to shooting my center-fire rifles. The rifles that I bring along for warming up with most frequently are an Anschutz-Savage 141, a Marlin XT-22VR, a Tradewinds (Krico) 311A, or a Winchester (Miroku) 52 Sporter.