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Thread: Centerfire Guns Used As In-Line Muzzleloaders

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    Boolit Master Good Cheer's Avatar
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    Centerfire Guns Used As In-Line Muzzleloaders

    Anyone here using center fire cartridge guns as in-line muzzleloaders?
    Break over single shots, bolt actions, rifles, shotguns?

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    Boolit Master Nobade's Avatar
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    I worked on one for a customer yesterday. Rem 700, 45 caliber conversion set up for smokeless powder. Uses arrowhead rifles breech plug and primer carriers, burns 90 grains of Benchmark behind a 375 grain jacketed bullet. I sure don't want to shoot that but he says it really works well.
    Today I noticed McGowen makes 425 caliber barrels, that should take unsized 416 bullets. Thinking of building one for myself just to see how it works.

  3. #3
    Boolit Buddy 444ttd's Avatar
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    i still have a tc encore 50 cal muzzleloader but i don't hunt with it anymore. its too much like my 444 marlin or 500 linebaugh tc encore barrels. i have killed deer with it, using pyrodex pellets, hornady sabot bullets and a 209 primer. it ain't fer me. i like flintlocks.
    "The religion of KE: proposed by the ignorant, and parroted by the unknowing" - MikeG

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    Boolit Master
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    Made a breech plug (45-70)that had no rim and took a 209 primer. Proof of concept, it worked, it was boring. I like flint locks better as well. My modern muzzle loader is a 54 underhammer, round ball gun using #11 caps.
    Friend used the idea for a CVA break open 45-70. His son loves it and he is thinking of getting himself one.
    “You don’t practice until you get it right. You practice until you can’t get it wrong.” Jason Elam, All-Pro kicker, Denver Broncos

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    Boolit Master bedbugbilly's Avatar
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    Short Lane sells breech inserts so you can easily convert a single barrel shotgun into a muzzle loading shotgun and use shotgun primers. Pretty slick!

    https://www.gunadapters.com/209-muzz...ding-adapters/

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    Boolit Master
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    Yes. Even gun mfgs agree. Thompson Center and CVA make a living off their break open designs. Remington and Savage both had ML versions of their bolt guns. There are even inserts for your break open shotgun to shoot some centerfire cartridges (not all calibers can be shot this way).

    Can you do a home garage version? Yep. If you do it properly and use quality material and have decent metal work skills.

  7. #7
    Boolit Master arcticap's Avatar
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    ****Converting inlines to accept primed cartridge cases.****

    Snidely70431 constructed home made breech plugs for a CVA and a Rossi inline from Grade 8 crown bolts.
    Then he drilled chambers into the bolts to fit a variety of primed cartridge cases to ignite the powder with.
    The cartridge case actually becomes the powder chamber because there's no flash hole in the breech plug, which allows the powder to flow right into the brass case.

    Here's 2 photos and a link to his thread with more pix. --->>> https://www.thehighroad.org/index.ph...#post-11039281

    These [below] are the breech plugs made for the CVA V2 line of break actions. The one at the top takes a .38 Special cartridge, the one in the middle a .223/5.56 cartridge shortened to 1", and the bottom a 9mm Luger.

    Click image for larger version. 

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    Last edited by arcticap; 10-02-2020 at 10:16 AM.

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    Boolit Master Good Cheer's Avatar
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    Nobody uses primed cases and muzzleloaded boolits sized to suit the barrels of their center fire rifles?

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    Boolit Master Nobade's Avatar
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    Quote Originally Posted by Good Cheer View Post
    Nobody uses primed cases and muzzleloaded boolits sized to suit the barrels of their center fire rifles?
    Not if you don't want to get shot. Loading a firearm from the front while it has a primed case in the chamber is never a good idea.

  10. #10
    Boolit Master arcticap's Avatar
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    Quote Originally Posted by Nobade View Post
    Not if you don't want to get shot. Loading a firearm from the front while it has a primed case in the chamber is never a good idea.
    There's a loading procedure to avoid that safety issue.
    A person could ram the round ball/projectile first before inserting a sealed cartridge filled with powder.
    And they can also dump some extra powder/filler in from the chamber/breech end to fill up the air space before inserting the cartridge.
    They could use a ramrod that was precisely measured to seat the projectile at a specific spot in the barrel which would control how much extra powder/filler to add.
    It may require some trial & error to determine the proper ramming distance for loading the optimum amount of extra powder.
    But once that's established, it would be similar to loading a Sharp's breech loading percussion rifle, except the projectile would be loaded at the muzzle.
    Using this method would basically only require that the gun be loaded with the powder and brass case while being held with the muzzle pointed down toward the ground to let gravity work.
    Last edited by arcticap; 10-02-2020 at 10:41 AM.

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    Boolit Master scattershot's Avatar
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    Sorta sounds like the long way around the barn, to me.
    "Experience is a series of non-fatal mistakes"


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

  12. #12
    Boolit Master Good Cheer's Avatar
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    Quote Originally Posted by Nobade View Post
    Not if you don't want to get shot. Loading a firearm from the front while it has a primed case in the chamber is never a good idea.
    I'll be sure and pull the rocks out of my flinters during loading.

  13. #13
    Boolit Master Nobade's Avatar
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    Well, I don't load my flintlocks when the pan is primed and it's cocked either...

  14. #14
    Boolit Master
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    Quote Originally Posted by Good Cheer View Post
    Nobody uses primed cases and muzzleloaded boolits sized to suit the barrels of their center fire rifles?
    Why would you want to?

  15. #15
    Boolit Master Good Cheer's Avatar
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    Quote Originally Posted by Nobade View Post
    Well, I don't load my flintlocks when the pan is primed and it's cocked either...
    That's pretty much on the mark. There's no need to load a firearm when it's cocked. And if you couldn't figure out how to load the firearm without it being cocked then that's not one you would want to use for muzzleloading.

  16. #16
    Boolit Master pietro's Avatar
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    I converted a .45-70 Ruger #1 rifle to a .45 muzzleloader 20 years ago for an acquaintance.

    The .45-70 chamber was bored/threaded from the rear for a Remington 700ML breech plug I ordered directly from Remington.

    The threading allowed the breech plug's position to be adjusted, in reference from the face of the CF falling block's to the seated percussion cap when the breech was closed. (ignition was constant after adjustment)

    Due to the Ruger's steel forend hanger close beneath the barrel, I didn't make any alterations for mounting a ramrod - so the owner bought/used a telescoping RR from a H&R, which he somehow carried in his belt.

    Needless to say, it takes him a bit of time to get off subsequent shots - but so far he hasn't needed a 2nd shot to drop a deer.

    He was using Remington .45 sabot ammo that use a .357 boolit - but IDK what he's using today.


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    Boolit Master Drm50's Avatar
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    A friend of my dad built a in line ML out of a 98 Mauser back in late 50s. Stocked it like a Weatherby and had a low power scope on it. Actually the guy wasn’t much of a hunter but when Ohio first got ML season he loved to jack wardens with that gun. He would walk along the road and wardens would lock up their breaks, thinking they caught a poacher red handed.

    I once used a trapdoor 45/70 as a muzzle loader. I had breech plugs with 209 primers. You ejected plug just as empty case. I was in parking lot at state hunting area when warden pulled in. He didn’t like my rifle. He didn’t cite me, gave me a choice of going home or going to cnty jail. He didn’t like me anyway. Had 30+ year running squabble with him.

  18. #18
    Boolit Master Good Cheer's Avatar
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    Got some paper patched I make for the .40 bore percussion that might work in the .41 mag single shot.

  19. #19
    Boolit Buddy
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    What I want to figure out how to do is turn some old shotgun or centerfire rifle into a flintlock or better yet some kind of electrical ignition to get around the shortage and unavailability of primers.

  20. #20
    Boolit Master Good Cheer's Avatar
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    Are 209 primers hard to find now?
    Thinking that putting a new primer in an empty shot shell is pretty easy and muzzleloading shot is easy too. There's probably videos on the interseine showing how to do it.

    That reminds me of a project I wanted to try years ago, a bolt action 20 gauge with rifled barrel to shoot minies out of trimmed back plastic empties.

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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