The 2 bullets that I have found to shoot best in my 243 Handi super lite are the 58g Hornady V-max and the 100g Rem RN , both do a wonderful job . The 58s for p-dogs / groundhogs / yotes and the 100s for deer . Even from that pencil thin barrel they both shoot 3/4" , 3 shot groups if I do my part .
The 58s do better with a mid-level load of Varget and the 100s like a near max load of IMR4895 .
stimpy