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MCA inserts/adapters

Discussion in 'Shotguns' started by Pokajabba, May 12, 2016.

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  1. Pokajabba

    Pokajabba member

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    Anyone here ever used/owned or own an MCA shotgun inserts or adapters? They have a long lead time listed on their website and I'm interested in the 18 inch .45-70 insert, but am not sure about the results I'd get when I bench rest it.

    For those who have shot inserts by MCA, how'd it shoot for you?
     
  2. desidog

    desidog Member

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    i can't speak for the shotgun adapters, but i have their rifle adapters in 7,62x54 > 32, 303 > 32, and 308 >7.62x25, and they all work as advertised.
     
  3. kBob

    kBob Member

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    desi,

    PJ is asking about RIFLED subcaliber inserts for shotguns. These I have not used. The rifle adpters are generally smooth bore so you in essence hace a free bore from the cartridge mouth in the adaptor to the lands in the rifle barrel. I like my .32 ACP in .308, but it is NOT as accurate as most of my .22 LR dedicated guns.

    Nor is the .22LR in .223 as accurate as a dedicated .22LR rifle with any load/rifle combination I have yet tried.

    I suspect this is from bullet tipping during the free bore part of the trip.

    I like both my adaptors, just don't expect more than plinking accuracy from them and minute of swamp bunny at 20 yards for the pot, please.

    The MCA rifled adapters are long rifled and chambered sections that go into break action shotguns. I understand they can be more accurate than slugs from the same gun.

    The idea of being able to turn say an old Rossi Overland Coach 12 gauge into an 1880's .45-70 Colt Double rifle "sort of" for the bear woods has a certain amount of appeal for some of us.

    Chiappa sells something like this as well these days. They even sell kits having both smooth bore adaptors and rifled adaptors to make the one gun (if that one gun is a break action single shot 12 gauge) survivalist (note lower case) capable of using a bunch of different ammo for his single shot.

    I keep hoping that gently used but ugly Winchester 37 in 12 gauge will show up in my Christmas stocking (you guys could start taking up a collection now) so I could play with chamber adaptors in a break action 12.

    -kBob
     
  4. Oldman11

    Oldman11 Member

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    I have a coach gun .12 ga double with two full length .45-70 inserts. I traded for it about five yrs ago and have not shot it much. Somebody put rem rifle sites on it ,its the one without outside hammers. Shoots To point of aim at 75 yards,then starts to spread apart,I would not want to shoot at a deer size target at much past 100 yards.
     
  5. DM~

    DM~ Member

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    I've got several of them in different types...

    Sometimes they work out, sometimes not. Rarely do they give really good accuracy and normally they don't regulate to the sights of they gun they are put in...

    DM
     
  6. Pokajabba

    Pokajabba member

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    But what if I were using a scope instead of a bead sight?
     
  7. BHP FAN

    BHP FAN Member

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    http://www.gunadapters.com/
    these guys don't have .45-70, but they do have .45 Colt, and a bunch of other calibers and guages, with immediate shipping, no wait, and high quality.
     
  8. DM~

    DM~ Member

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    Then you sight it in and hope for the best... Some don't shoot horrible, some don't.

    DM
     
  9. kBob

    kBob Member

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    When using a rifled undersized insert....like a rifle or pistol caliber in a shotgun or a .22 from an adaptor in say a .30-06......you need to have some way to make sure the adaptor goes in the same position each time.

    There is a real chance that the outside and the bore are not absolutely cented and parallel. Thus if you have no way of knowing you are putting the thing in the same way then you have no idea where the actual bore is pointing.

    As most do not have any means of using the guns ejector to eject the sub caliber cartridge, only the adaptor itself, there is no need to worry about lining the ejector up with anything.

    Mark the rim of the adaptor with a felt tip or some such to begin with on the bottom so you can see it as you load the thing in the chamber.

    Pick a position, 6 o'clock is easy on most single shot break action shotguns as the ejector is there and a good reference point. Shoot several shots with the adaptor in that position and using the same sight picture and point of aim to give you an idea of how big a group you will be dealing with.

    If that group is not where your sights are, experiment. Turn your reference dot on the base of the adaptor to say the 3 oclock position or 12 or 9 and see if that moves your shot group closer to the point of aim you use for slug shooting with or centering your pattern or whatever normal use of the shotgun you have.

    Basically play with turning the device until you get something you can live with. At that point make a permanent mark on the adaptor base directly centered over the ejector so you have an easy permanent reference point for loading.

    With out a reference point, every time you load a shell and adaptor into your shotgun it is likely as not pointed in a slightly different direction. Failing to develop such a system is the major reason folks complain of inaccuracy in these systems. They will not ever compare to a goof rifle in said caliber, but they can, or at least might, be usable if you do your part.

    -kBob
     
  10. Pokajabba

    Pokajabba member

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    Bob, you make a lot of great points. I've known that with adapters for shotguns, especially the .22 rimfire adapters, there's a certain alignment/rotation position in the barrel that gives the best accuracy. If that's the case for rimfire, I see no reason it's not the same case for centerfire.

    I'd be happy with a 6 or 8 inch group at 200 yards with the .45-70 insert.

    Someone above mentioned the .45 Colt. I'd go that route with MCA because they make a .45 Colt insert with an 18 inch barrel instead of the Shortlane with an 8 inch barrel. I'd get the .45 Colt only if the MCA insert was able to handle "Ruger only" .45 Colt loads, which no where on their sight do they say it can.
     
  11. FSJeeper

    FSJeeper Member

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    I just got several of the rifle adapters in and one of the Shotgun adapters to experiment with. These take a while to receive so get any idea of ebay or Amazon delivery times out of your head. I purchased with a USPS Money Order via snail mail the old school way as they do not process orders on the internet.

    The shotgun adapter I got was in 7.62 x 39 in 18" length and appears to be a quality item. Fits very snug in the shotgun and locks up tight. I have not shot it yet.

    If I can get 5" groups with this at 100 yards I will consider this a viable piece of kit. I'll also proceed with buying one in 45 Long Colt 18" long also.
     
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