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Thread: 12 ga. to 45 AR Build

  1. #61
    Boolit Buddy
    Join Date
    Jun 2011
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    Thank you roverboy, I appreciate it!

    This .45 will be this year's meat getter for deer, and after completing my bullet expansion tests, it looks like the clear winner is Speer's 250 gr. Deep Curl @ 1,300 fps.. Bullets were shot in Ordnance Grade Ballistic Jell @ 30, 60, 90, 120 and 150 yards, and ALL bullet expanded to well over 1/2" in diameter.

    And considering how much my wife likes shooting this gun, I'm trying to find another shotgun so I can build me one! My wife comes first, so I really don't mind. Another plus for the .45 is that it doesn't echo for miles around like what is does when you cut loose with a high powered rife and all your neighbors are throwing a fit about it!

  2. #62
    Boolit Master


    Join Date
    Oct 2009
    Location
    Northern Michigan
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    4,220
    Don't know how I missed this thread before.

    First, glad to hear the health concerns were put to bed...

    Next, you did a really nice job on the gun. I like single shot rifles but break opens not so much.

    Interesting you achieved good accuracy with a "cheap" platform. I was set to purchase a baby RB in .357 until I read the reports of mediocre accuracy.

    Looking forward to seeing your second build
    Don Verna

    NRA Endowment Member

  3. #63
    Boolit Buddy
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    Jun 2011
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    Thank you dverna!

    I believe the good, now better than good accuracy comes from several things.

    A quality barrel liner.

    A properly cut chamber.

    A completely stress free insert being permanently installed into the shotgun barrel.

    If this was a barrel stub, the forend would have to have been pillar and glass bedded, with absolutely no points of stress anywhere around the forend/barrel contact.

    By using a shotgun barrel, there was no need to do the pillar and glass bedding, because when the barrel insert was installed inside the shotgun barrel, there were NO contact points between the barrel liner and the shotgun barrels bore - meaning it was completely stress free. This, I believe, is where the greatest accuracy potential of this gun comes from.

    Shooting Speer's 250 gr. Deep Curl, which is now my only bullet of choice in this gun, every 3-shot group fired @ 100 yards can be covered with a quarter, with absolutely none of the bullet holes showing around the outside edge of the quarter!

    The next build? I was thinking 327 Federal, but with already having all of the bullets, brass and reloading dies for a 38 special, I believe that will be the next cartridge I chamber for. Plus, it will also be one of my wife's birthday presents so she can go deer hunting with me this year, and have a relatively QUIET gun that won't rattle the windows in our neighbors houses, and have to worry about everyone getting so upset, like what they do when a high powered rifle goes off!

  4. #64
    Boolit Master Tokarev's Avatar
    Join Date
    Aug 2007
    Location
    Canada (North of upstate NY)
    Posts
    705
    Hey, Assassin,
    You've implemented my dream project miraculously. I am still sitting on a SxS 12ga Belgian damascus gun which I am contemplating to convert to 45 LC. Just waiting for the right donor bbl to turn up.
    I am very curious about the accuracy your project is capable of. Keep up good work!

  5. #65
    Boolit Bub
    Join Date
    May 2020
    Location
    Oklahoma
    Posts
    31
    This is awesome work Assassin, glad I found the thread. That is a thing of beauty.

  6. #66
    Boolit Buddy
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    Jun 2011
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    IHuntDragons - Thank You for the compliments, I appreciate it!


    Tokarev - I know the "J" words bullets are taboo over here, and I apologize to those who are offended!

    As stated in another post here, I tested these bullets specifically -


    Hornady 230 gr. XTP

    Speer 230 gr. Gold Dot

    Speer 260 gr. Mag-JHP

    Hornady 250 gr. XTP

    Hornady 225 gr. XTP

    At 50 yards, ALL bullets will will keep bullet holes touching at 50 yards when tested from the bench. But, when stretching the distance out to 75, 100, 125 and 150 yards, the Steer 250 gr. Deep Curl was the clean winner, and with a muzzle velocity of 1,300 fps., it still expands into a perfect mushroom shape with with recovered bullet weights averaging 245 to 248 grains, with expanded bullets @ 75 yards being dime size, and those at my self imposed maximum shooting distance of 150 yards, all being over 1/2" in size.

    Though a heavy gun, I have turned more than a handful of the Baikal side by side shotguns into double barrel .45 rifles, and while no where near as "pretty" as a $50,000 double gun, they are a lot of fun to shoot and carry, and VERY accurate! And for needing a FAST second shot, you can pull off 2 shots just as fast as you can possibly pull the trigger!

    And my reason for using the Baikal double barrel shotgun, is because they also made a few of these guns in 30-06, and since those extractors were available at the time, I didn't have to take the time to machine them from scratch. I just did an extractor swap and cut, and other than a little polishing, it took less than 5 minutes to have a properly fitted extractor!

    These double guns in .45 Auto Rim and 45 Super made for a perfect little double rifle for hog hunting! Small bark, but big bite, these guns in .45 Auto should have been for sale on the open market, as they make for one of the best close range hunting guns there is. You could sit in a hunting blind and shoot hogs all day, and as relatively quiet as the .45 is from a rifle, with the right loads, you could shoot hog after hog without scaring off everything everything else around you, because there is no resounding echo for miles around, like what there is with some of the high powered rifles that are in use today.
    Last edited by ASSASSIN; Today at 02:48 PM. Reason: Spelling

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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