I did discover the biggest trick with the .17HMR is called Boresnake... I have 2 5-shot mags. It gets snaked every 10 rds.. Makes a big difference/! In mention to my daughter getting the 250yd doggies.. They were 1st shot kills, but many misses as well.. Still makes a Dad proud! Wanted to go out this morn... :'(, windy and drizzly...