410 to 327 text2

327 Federal 410 Shotgun Adapters

(13 customer reviews)


327 Federal Magnum Shotgun Adapters for 410 Shotguns

327 Federal Magnum is a High pressure round only use with capable shotguns.

Adapters come in 3 Lengths” 5, 10 and 16″

Please note:  Due to the required thin wall thickness we are not able to have O-rings on these adapters as we normally do.  If you have issues with accuracy we recommend using some Teflon (plumbers tape) to achieve a snug fit on the muzzle end.


327 Federal Shotgun Adapters

327 Federal Magnum Shotgun Adapters Allow a 410 Shotgun to use

5 Types of  Ammo. 327 Federal Magnum in addition to 32 Long, 32 Short, 32 H&R Mag as well as 32 ACP.

Compatible with Break Action single barrel also double barrel shotguns.

Heavy Duty Steel Construction

Rifled with a 1:12 twist rate.

Rifled Dimensions:  6 Grove Bore .300  / Grove .312

Black Oxide Coated.

5, 10 and 16″ Lengths

(Because of the thin wall required for this insert Therefore  I recommend using only standard Load ammo.  In addition If reloads are used make sure the pressure stays at or below the standard PSI range)
Please Note:  Not all shotguns are the same!  While most shotgun are capable of handling high pressure rounds such as the. On the other hand some are not.   Therefore only use these rounds in shotguns that are capable.  For example, a shotgun with a SB1 or Sb2 reciever.  I recommend on any shotgun to test the first shot in a vice while out of harms way in addition  always wear eye and ear protection.  After that if you see that the primer punctured in the round discontinue using this round and use the less powerful round. Such as a 38 Special instead of the 357 Mag These high pressure rounds include: 45-70 gov., 357 Mag, 327 Shotgun Adapters , 44 Mag, and 22 Hornet.  Please always be safe and aware.
Thank you for reading.

Please be aware that the 16″ 410 adapters may not work in all shotguns, depending on the bore diameter.  Shotguns with tapered bores may not fit.  Due to the already thin wall it is not possible to make these adapters any smaller.

What is a tapered bore?
A tapered bore is exactly what the title implies. The diameter of the bore gradually tapers down from breech to muzzle. The amount of the taper is slight — perhaps one-thousandth to as much as two-thousandths of an inch; but at the time this service was performed, the measuring tools needed to accurately measure it weren’t commonly available. So, most of the makers didn’t actually know how much they were tapering their bores — just the fact that they were.


What are Shotgun Adapters?

Shotgun Adapters frequently called Chamber Reducers or Shotgun Barrel Inserts. Our shotgun adapters allow you to use other types of ammunition in a Break Action Shotgun. Including double barrel and over and under double barrels in addition to the popular single barrel break action. We offer several different versions to suit your preference in ammunition, as well as length. 12 and 20 Gauge shotgun adapters are our most popular adapters followed closely by the 410. 16 Gauge is something we plan on expanding in the future.


FPS (Feet Per Second)

As a general rule, the longer the adapter, the more FPS it produces. However, with low-pressure rounds such as the 45 colt, the fps difference is minimal. If you are interested, here is an excellent website that gives a good idea of fps per inch BBTI. All of our shotgun adapters are entirely made in the United States and are an affordable addition to your break action shotgun. Thank you for you interest in our Shotgun Adapters or Chamber Reducers. We are working to make more adapters for more calibers, so you can sign up to be notified here
The video below gives a brief demonstration of how they work.

We are working to make more adapters for more calibers, so you can sign up to be notified here. Thank you for your interest.

Additional information

Weight N/A
Dimensions N/A

5, 10, 16

13 reviews for 327 Federal 410 Shotgun Adapters

  1. Bruce Murray (verified owner)

    Same as above ?

  2. Gil (verified owner)

  3. Ronald Miller (verified owner)


  4. Jeff Gerlitz (verified owner)

    GREAT COMPANY!! Very quick response and communication, Adapter is a very professional job, excellent bluing. Ejector function works great. In addition, Chad is working with me on a special project for my unique vintage shotgun. BUY WITH CONFIDENCE!!

  5. Jody Vigness (verified owner)

  6. Jack B. (verified owner)

    I love it so far. It’s been accurate beyond my expectations with my .32 S&W reloads.

  7. Jerry Adams (verified owner)

    This is a very versatile shotgun adapter. It will shoot virtually all 32 caliber cartridges & shoot them very accurately, even with only a brass bead front sight.

  8. Esequiel Zeke (verified owner)

    Chaszel is the best as always , great customer service, fast shipping and awesome quality on all their products. Thanks again Chad. I highly recommend him for all of your adapter and firearm needs⭐️⭐️⭐️⭐️⭐️.

  9. Robert Unsworth (verified owner)

    I purchased the .327 Federal adapter to basically convert a Stevens 410 O/U into a Model 24. I took it for quick test run today. It worked flawlessly, hitting soda cans off a stump at 20 yards. Using a six o’clock hold on the cans with a brass bead sight, hits dead center on the cans with .327 fed/mag and .32 H&R mag
    A little bit lower hits with .32acp
    I couldn’t find any.32 shorts or longs to try. I love all the choices I have for ammo. It makes it a very versatile “Model 24” for small game to even deer at woods ranges.
    I can’t wait to get it to the range and try longer distances.
    It was well worth the backorder wait and the USPS sending it on a vacation enroute to here. Another quality product (it’s my third) from a great company with excellent customer service and communication!
    Do not hesitate to buy here!!
    I’ll surely be back for more!!!

  10. Kerry P. (verified owner)

    I have always received in-stock items 5 days or less. So far they always fit.

  11. Tim D. (verified owner)

    fast delivery,looks and fits good haven’t been to range yet. we shall see

  12. Robert (verified owner)

    I apologize for the lateness of my review of the two .410 to 9MM and 327 16” adapters purchased earlier this month. I put it off until I was able to take them out for a test drive. I was afforded time to do so this morning, and I’m pleased to report they both shot flawlessly with at least three inches at a bit over fifty yards. I did have to wrap some Teflon around the muzzle on both adapters to stabilize them once they had heated up. Once cooled and reheated, they both performed as described, even after fifty rounds each. An unexpected plus was my Stevens ejected the cases on both without displacing the adapter. I must add that after waiting for two years for the adapters their performance was truly rewarding. results

  13. Aaron (verified owner)

    It took a while on back order, but you came through!

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