That has to be dissapionting buying a NEW rifle that you cant find a load for. When shooting an old 76 with a not so great bore you kinda expect a bit of finicky from it. If I had one with a new bore I would have to solve the problem, or pull my hair out trying . If there is no mechanical issues then , there is a load it will shoot good. Has to be. But what is it? Thats the fun of it all finding that sweet spot. Funny thing I have a 76 in 40/60 that will shoot anything I feed it very accurate, and another not much different that must have a special load to shoot accurate MISS FINICKY . A 73 carbine 44wcf that will shoot most as good as any rifle I have within iron sight range 150-200yd, for me .no matter what I feed it so far it gets along with anything. Then there is the 28"HVY barrel 73 44wcf that must have the special load but drives tac's with its favorite load. It may be coincidence but my 76 rifles chambered in 45/75wcf are the least finicky of all. They are shooters with any bp. brand I have tried even the sub. Pyrodex. About the only thing that differs is the ammount and type of fouling. Note all my 45/75's get 350 gr bullets. Even when I shot PP slick's through them they were 354gr. PS. they shot great single load only , but fun .,,,DT