As it is the stuff the military made and used for their rifles on the two way range I think it is more than likely better than any thing else. Just a feeling I have also the sights would have been zeroed for that ammo in the first place. As a bloke that shoots a lot of 303 and reloads it I can say it is not an easy load to duplicate in fact a 100% duplication is not possible because the components available are different.