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Thread: 12 Gauge A-Bolt - Bolt won't open after 3rd shot

  1. #1
    Boolit Master

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    12 Gauge A-Bolt - Bolt won't open after 3rd shot

    I posted this under factory rifles, but didn't get many looks....

    Was just at the range testing several different brands of slugs in this gun.
    Remington
    Winchester
    Federal
    All loads were 2 3/4 designed for rifled barrels.

    Of the factory loads nothing seemed to group well past 50 yards except the Federal Truball loads.

    While shooting the Truball rounds, the gun locked up. The bolt would operate, move from the closed to open position, but would not unlock and open.
    After playing with the gun for 5 minutes or so the bolt was able to cycled open. The casing didn't look any different than any of the other that were shot from the gun. After cycling the gun a few times and looking things over, I mounted the gun in the lead sled and shot more than 10 rounds remotely (Remington and Winchester), the gun fired and opened as it should. I loaded gun with 3 rounds of the Truball, and after firing the gun three times the bolt locked up again. It appears that this gun doesn't like these Truball loads.

    What say you, anyone have any ideas?

    Scott
    Scott

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  2. #2
    Boolit Master

    Hogtamer's Avatar
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    None of those slugs are designed for rifled guns. "Rifled" in this case refers to raised ribs on the slug itself. The foster type slugs will expand to fill most bores with minimum bearing surface. You've probably leaded the rifling in your barrel something awful. A true sabot or wad type sabot like the Lyman 525 are designed for rifled barrels.
    "My main ambition in life is to be on the devil's most wanted list."
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  3. #3
    Boolit Master gpidaho's Avatar
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    Quote Originally Posted by Hogtamer View Post
    None of those slugs are designed for rifled guns. "Rifled" in this case refers to raised ribs on the slug itself. The foster type slugs will expand to fill most bores with minimum bearing surface. You've probably leaded the rifling in your barrel something awful. A true sabot or wad type sabot like the Lyman 525 are designed for rifled barrels.
    And that's how I leaded the Heck out of my new 20ga. 11-87 barrel. LOL Gp

  4. #4
    Boolit Master

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    Yes. I misspoke, this are rifled slugs for smooth bore guns.
    I had already tried them in my smooth bore pump and the results were pretty dismal. I want to try the A-Bolt, as I was curious how they would group from a rifled gun.

    No leading to speak of after 30 or more firings.

    My question/concern was why the bolt locked up after shooting the Federal rounds?
    Last edited by dsh1106; 09-20-2020 at 11:20 AM.
    Scott

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  5. #5
    Boolit Master

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    Had a problem with Remington low recoil or another type of shotgun ammo a while back. As the barrel/chamber heated up, the plastic shell wanted to bond or stick to the chamber. after the gun cooled, it would fire and cycle normally.

  6. #6
    Boolit Master

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    A chamber cleaning seemed to help.

  7. #7
    Boolit Master
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    Quote Originally Posted by dsh1106 View Post
    Yes. I misspoke, this are rifled slugs for smooth bore guns.
    I had already tried them in my smooth bore pump and the results were pretty dismal. I want to try the A-Bolt, as I was curious how they would group from a rifled gun.

    No leading to speak of after 30 or more firings.

    My question/concern was why the bolt locked up after shooting the Federal rounds?
    Amazing! I've never seen a rifled barrel shoot Foster slugs without leading the Beejeezers out of it! You're a lucky man!
    "We take a thousand moments for granted thinking there will be a thousand more to come. Each day, each breath, each beat of your heart is a gift. Live with love & joy, tomorrow is not promised to anyone......"

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  8. #8
    Boolit Master

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    Quote Originally Posted by centershot View Post
    Amazing! I've never seen a rifled barrel shoot Foster slugs without leading the Beejeezers out of it! You're a lucky man!

    I did clean the gun with my boresnake, but not any more than I would normally.
    Scott

    You can easily judge the character of others by how they treat those who they think can do nothing for them.

  9. #9
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    Scott:: See if you can find some Lightfield Slug ammo. In a rifled gun they are as good as you're going to get. Or try some STI Sabot Slugs like the ones I make my Non Toxic Slugs with. The accuracy with those is superb and I know you've seen the pic of the group I shot with my A5 with Hastings Rifled Barrel. 1x1.5" at 50 yards with open sights.

    The Lightfields are "Discarding Sabots" that impart spin to the slug and then separate immediately after leaving the muzzle. They also have a Tail Wad that stays with the Slug all the way.

    The STI Slugs are NON Discarding and stay with the Slug all the way. Last pic is one with a Lead Insert instead of Brass.

    As far as the Ejection Problem it sounds like a rough chamber to me.

    Randy
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  10. #10
    Boolit Master


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    Quote Originally Posted by centershot View Post
    Amazing! I've never seen a rifled barrel shoot Foster slugs without leading the Beejeezers out of it! You're a lucky man!
    I've tried rifled foster slugs from every rifled gun I have. I've never had them lead at all. My roughest bore is in my barrel for my Benelli Nova, a barrel made by the older pre-2005 Ithaca company. It is so rough you can see the tool marks as though it was bored with an 80 grit sandpaper. That barrel is very touchy on the load it will shoot. It is a 1:28" twist, but didn't shoot any sabot slugs well that I remember. The very best load in that barrel was Remington Slugger's, the high velocity 7/8 ounce version. Not a spec of lead in that barrel after 25 shots.

    As for the truball's sticking, I would lean towards a rough chamber. It wont hurt anything to give the chamber a quick polish with some fine steel wool. You only need to do about 1" into the chamber. Also try the high velocity 7/8 oz Remington Sluggers. Sometimes the 1 ounce works better, sometimes the 7/8 oz works better. I have never found the reduced recoil slugs to shoot well.

  11. #11
    Boolit Master
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    I shoot remington sluggers in my 870 with a Hastings 24 in fully rifled barrel, almost exclusively. Have not experienced much leading at all.

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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