Any tips on becoming a better aim?

[Midnitemo]

the first rounds are high usually but not alway's due to less friction but sometimes low cos off overoiling ... the gun will settle down into a consistent point off aim after a couple of shots , i know stalkers that don't clean there bore between stalks or after they've been on the range zeroing....its not a big difference on a 20m range but it can be as the ranges increase....snipers know there gun intimately and know what adjustments to make for a coldclean/fouled bore shot...