If your gun will keep the shot within1-1 1/2inches of it's normal group,clean thefirst shot,your not gonna miss many deer. The only way to find out is by trying it! By tuning your charge,you will find THE most accurate load,(not afair,orOk group,but a really accurate group) itwill shoot very close to the others,(clean,or fouled)once you have found the "magic load". It takes allot of range work,but will pay off big when it counts.