Every rifle is different, some shoot one weight best, some another brand better. At ranges the 30-30 would be used for, especially using irons, I doubt you'll see enough difference to matter. I've seen an old shot out Winchester or two that wouldn't group better than six inches at 100 yards but were deadly for deer out to 150. If you ever decide to scope your rifle, try Hornady's Leverevolution ammo, these will turn you 30-30 into an honest 200-250 yards deer rifle. I load Nosler Ballistic Tips for mine, works about the same as the factory Hornady stuff