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Thread: 450 Marlin

  1. #1
    Boolit Buddy brad925's Avatar
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    450 Marlin

    Has anyone here loaded the 450 Marlin with cast and BP? How well did it shoot?
    Lean into 'er and let 'er buck!!!

  2. #2
    Boolit Grand Master


    missionary5155's Avatar
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    Good morning
    Not this caliber but every rifle I have tried 3F Goex in with BP lube and 40-1 cast lead shoots at least as well as any smokeless load I have tried. Have not tried many necked down brass but those with slight taper necks like 375 HH worked fine for us.

    A 450 Marlin should be fine. Just a modified 45-70. Biggest issue you may face is the brass being too stiff to expand to the cylinder walls. I would anneal 5 cases first or you may have a bad seal and soot up the action. We use 3F Goex as it burns much cleaner than other Goex powder. If you have the better BP brands on hand use them.
    Mike in Peru
    "Come unto Me, all you who labor and are heavy burdened, and I will give you rest." Matthew 11:28
    Male Guanaco out in dry lakebed at 10,800 feet south of Arequipa.

  3. #3
    Boolit Master

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    Unless I'm mistaken the 450 Marlin has slightly less case capacity than a 45/70 so getting a full charge equivalent to 45/70 might not be practical, however the reduction would be slight so performance should be very close.

    On a rifle I am working on now I had considered using 450 Marlin because I had a reamer and several boxes of brass. Due to the fact I intended to shoot mostly BP in this SS rifle I traded the reamer and brass and settled on 45/70 instead, the slightly reduced case capacity along with much harder to find (and more expensive when it could be found) brass just made this seem like a bad idea. If I had a Marlin chambered in the 450 I would not hesitate to shoot real BP in it just as I do with both my 45/70 Marlins, anneal those case necks and load those things like you would a 45/70 and any performance differences should be all but negligible.
    Statistics show that criminals commit fewer crimes after they have been shot

  4. #4
    Boolit Grand Master



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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check