I shoot both a 204 Ruger Tikka and a 17 Remington Classic. With the 204 I use 40 gr Nosler BT. With the 17 Remington 30 grain BT. The 17 30gr performs better and within 300 yds handles the wind better than the 204. It definitely will allow you to spot hits or misses. My stash of 30 grainers came from Todd Kindler who I guess quit offering them. There is a fellow from the midwest that is making good 30 grainers but I can't remember who that is maybe others on the forum can chime in.