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Thread: Safe pressures for an itallian sharps in 45-70

  1. #21
    Boolit Buddy FrankJD's Avatar
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    Chiappa primed cartridge Sharps are good for trap door loads with "smokeless black powder" (Pyrodex, etc), or with real smokeless powder such as AA5744. This means no Lever gun or Ruger #1 loads. The old Lyman #49 & Cast Bullet manuals clearly identify these three levels of loading for the .45-70 cartridge.

    From the Chiappa Sharps 1874 pamphlet ...

    All our guns are tested in the Armi Sport facility. To guarantee the gun is safe, it is sent to the National
    Proof House of Gardone Val Trompia – BRESCIA – ITALY - for proof testing.
    The Proof House tests the firearm with heavy loads then checks the barrel, chamber and headspace to
    make certain the firearm is safe for use with standard factory ammunition.
    The National Proof House will put their markings on the gun, according to the Italian law, certifying the
    gun is qualified and can be sold.

    As to reloaded cartridges, we wish to point out that the Sharps rifle has been designed and manufactured for use
    with black powder and similar (Pyrodex) only. As far as the loading is concerned, we suggest to use a loading
    manual from specialized companies (for instance RCBS, Lyman, etc)

    A NOTE ABOUT HISTORICAL FIREARM DESIGNS
    Armi Sport proudly manufactures finely crafted replica
    firearms reproducing famous historical weapons. These
    firearms are manufactured using leading edge machinery
    and high quality modern materials. They are faithful
    reproductions of firearms originally designed in the
    nineteenth century; therefore, if you choose to own or use
    historical firearms you should be aware that, along the
    one hundred or more years past, there have been
    significant advances in firearms design and safety. Armi
    Sport manufactures these guns not as state of the art
    firearms, but as historically significant firearms for the
    collector. It is vital that the user be familiar with his
    firearm and possible safety risks that may be present in
    the design. Most significantly, the user should realize that
    the designs of safeties - or even the presence of adequate
    safeties - vary significantly on historical designs and do
    not offer the protection against accidental discharge that
    modern firearms safeties achieve.

    Similarly, any firearm that is designed to be fired using
    black powder (or Pyrodex) has basic risks not found in
    modern cartridge firearms. Black powder is a dangerous
    explosive and has to be used and handled with extreme
    caution. The slightest miscalculation or carelessness with
    black powder firearms can result in serious injuries to the
    user


    The .45-70 is the only government I trust.

  2. #22
    Boolit Master scattershot's Avatar
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    The original 45/70 was designed to shoot through a horse at 200 yards, I’m told. Not sure why you would need more than that, unless there’s a scourge of mastodons in your area.
    "Experience is a series of non-fatal mistakes"


    Disarming is a mistake free people only get to make once...

  3. #23
    Boolit Master
    JSnover's Avatar
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    Quote Originally Posted by Dtdk View Post
    My goal is to be around 1300-1400 fps with cast boolits, not Hardcastle in the 405 to 535 grain sizes. General shooting with the 405 and get into some long range stuff with the 535 at some time.
    Long range with the 535 grain boolits can be done at around 1300 fps (not by me... yet). Lyman #50 shows 28 grains of 5744 under a 535 grain boolit as a max load for Trapdoors. Your Sharps probably doesn't weigh as much as my roller. If I was you, working with that rifle, I'd try 24-26 grains (23 is the starting load), see how it feels and how it shoots.
    Warning: I know Judo. If you force me to prove it I'll shoot you.

  4. #24
    Boolit Buddy FrankJD's Avatar
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    AA5744 is arguably the better smokeless powder for trap door loads as it was made for loading these old cartridges and yielding a better fill within the case.
    The .45-70 is the only government I trust.

  5. #25
    Boolit Master
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    Quote Originally Posted by NSB View Post
    I emailed Pedersoli and got a response that way. Odd that they’d put an “odd” number in the manual of 29,007psi. How did they cut it that close? 007….really? Like seven psi could really make a difference.
    29007 psi converts to 20,000 newtons per square centimeter - wonder if they gave you a metric conversion figure?

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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