Some quick history on the 45-70 and 450 Marlin.The 45-70 remains at a SAAMI 28,000 for the old trapdoors and all the 45-70 bullets are made to perform at that level except the new one like the A-Frame and North Fork.

Then came the 450 Marlin at 43,500 PSI SAAMI( to match what some handloaders have done with the modern 45-70) in the very same action(1895) with a belted case so it cannot be used in old trap door rifles.Speer claims the Winchester 45-70 brass holds 7 more grains of powder than Hornady 450 Marlin brass..No lecture here.Make of it what you want.

Rick Jamison was the first to take the 1895 action with the 450 Marlin with some of the better bullets out of a pressure barrel.(NOTE>>The 300 Nosler loads with RL-7 are with the old colored RL-7 Not the new)

Some impressive numbers for a levergun!!!!!!

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Jayco