I purchased a Ruger Mark II stainless steel 243 with synthetic stock. It is for my grandson. I have attempted to develop a reload to get it to shoot sub one inch (three shot) groups at 100 yards. 2 inch is the best I can get. I have free floated the barrel (it hit the stock in about five places) and tried various powder weights with Nosler 100 grain partition bullets. Used IMR 4895 and IMR 4831. No success. Using an Astec 2.5 to 10 power scope and sand bagged bench rest. Am I expecting too much from this short barreled gun? Any suggestions for loads or other things to try would be appreciated.