Curious about 45-70 factory ammo

[snuffer#1]

I wondering about remington and winchester. I have a few rounds left of rem. and win.. My 45-70 is dialed in with the win. I shot a couple of rem. They shot low and yes they were the same gr. bullet.(300). Now I reload for everything I have. But I'm wondering if the win. ammo has a bit more juice than the remington. I have some loads worked up for 45-70. Using imr3031 and 4198. I've heard that remington is the accuracy load while the win. is for more power! That sounds kinda stupid to me! I will say the win. ammo hits harder. Anyone have any ideas?
                                                                                                 snuffer

[quickdtoo]

There's not a lot of difference in the velocity by their specs, 1810 vs 1880, but the Win partition gold is a heck of a lot better bullet than the Rem bullet, dunno about the Win JHP bullet. Win doesn't indicate their barrel length, so it's most likely a toss up. Neither is loaded hot by any means, they're both trapdoor loads.

Tim

http://www.winchester.com/products/catalog/comparerifle.aspx?multiadd=U1BHNDU3MC0xLTErQUVBLVg0NTcwSC0xLTE=&action=3&ctype=1&atype=1

http://www.remington.com/products/ammunition/ballistics/comparative_ballistics_results.aspx?data=R4570L