You talking the H&R single shot, break action? If so I have found that these may be iffy as far as consistent accuracy. My best buddy bought one each for his sons. One in 243 Win. for his youger son and one in 308 Win. for the older. I helped he and his son sight these in. The 243 shot great. It shot Federal Permium (100 gr. Game Kings) lights out ... right at 1.5 MOA. The 308 was a 3.5 MOA at best "dog" despite me trying many,manyhand loaded combinations.