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Thread: Turning your 12 Gauge Into a 410 Shotgun.

  1. #31
    CGN Ultra frequent flyer Suther's Avatar
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    Quote Originally Posted by Alvin1095 View Post
    Will these work for .45lc as well?
    Probably not?

    If I'm not mistaken, 45lc is a bigger caliber, and while they're about the same size chamber as a 410 they are not the same bore size and the guns that can use both have a 452 bore diameter not 410.
    "We don't take souls, we leave that to wives and girlfriends, but we can do a layaway " - Grumpy Wolverine.

  2. #32
    Contributing Dealer Frontier Firearms's Avatar
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    We only have available the 12 to 410s right now.

  3. #33
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    Quote Originally Posted by Suther View Post
    An interesting test on the effects of barrel length.
    Ballistics by the inch is a great resource: http://www.ballisticsbytheinch.com/calibers.html

    No data for shotguns but it gives you an idea of how having a barrel that is too short, or indeed too long, can dramatically affect velocity.

  4. #34
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    Quote Originally Posted by Frontier Firearms View Post
    We only have available the 12 to 410s right now.
    ok, thanks for following up!

    ill keep watching here to see if you update in the future
    I've had 1 night benders that cost more than an SKS

  5. #35
    CGN Regular maltextract's Avatar
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    How about a 12 to 20?
    You can never have too much ammo, unless you are drowning, or on fire.

  6. #36
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    Why? 410 shells are super expensive.
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  7. #37
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    Quote Originally Posted by hamermill View Post
    Why? 410 shells are super expensive.
    My oldest kid has stared hunting. we have lots of 12 & 20 ga around but no 410.

    He has shot a 20 and flinched a bit on the recoil. i know as he gets better form and a bigger body frame this will go away. but if put 410 in he can go for grouse now and not flinch.

    I could see using this as a stepping stone to bigger gauges
    I've had 1 night benders that cost more than an SKS

  8. #38
    CGN Ultra frequent flyer legi0n's Avatar
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    Quote Originally Posted by Suther View Post
    I feel like thats not a fair comparison though? Wouldn't the gases start blowing by the wad shortly after the forcing cone, negating the potential increase in velocity caused by a longer barrel? A bullet seals the bore until it exits, which allows the expanding gases to continue to accelerate the bullet until it reaches the end of the barrel but I didn't think shotgun wads seal nearly as well which would make a longer barrel mean less for velocity?
    that's correct, less then 3" ammo in a 3" chamber may lose some velocity if the shotcup+wad+seal is shorter then the gap. (gap = shotshell expanded length - chamber length)
    but, in 410, the shortest shotcup easily covers the gap. My reloads take that into account too.
    whereas with the inserts, after 2" (my approximation of the shown inserts) there's only "gap". Gases blow by while the shot ....
    do you want to pattern some loads with me? in the bush?

  9. #39
    CGN Regular RPgunguy's Avatar
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    Interesting stuff, will full length inserts become available?
    Last edited by RPgunguy; 07-31-2019 at 01:35 AM.
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