Nothing in Fort McChicken? Its time to start reloading my friend, factory loads are limited by BP pressures so that all factory ammo can be fired in any rifle in good condition. Handloads for the Marlin blow that limitation out of the water and for much less than factory ammo. Last box of 20 Remington .45-70 405gr SP I saw was $50. I can buy 100 405gr Rem SP bullets for $50... I picked up some 250 TSXs and a pound of AA1680 today to play with. Barnes data states MV of over 2600 fps @ max.
For the record we cary 45-70 in stock. Hornady 325 grn FTX @$35 and Fusion 300 grn @$49. Phil.
not all factory ammo is at trapdoor pressures its up to the owner to know.
I sent you a PM.