Hudson .45ACP Cartridges for M1A1 Thompson

Post by Mark

These cartridges appear to be quite simular to the MGC Thompson .45 ACP cartridges.

I think that they will interchange as long as the "piston" is exchanged for a MGC "HW piston" as the original Hudson "piston" has a hole drilled in it's center.

Otherwise, the only other differance that I have observed is the "bullet" nose it does appear to be slightly more rounded than the MGC's

Does anyone know if the cartridges are truly interchangeable? As I would like to buy a Hudson M1 Thompson and I only have 12 Hudson .45 cartridges and I have no other sources for them at the moment.

Post by toku

Hi. Mark

An answer may be slow, but I tried to consider dimensions of Hudson and MGC, but a piston of Hudson has a short 2.3mm. And 0.5mm are big the inside diameter of a cart.
Therefore, I have to lengthen length of detonator when I use a piston of MGC for a cart of Hudson.
The share that the cart inside diameter is big may absorb an error by the elasticity of an O ring.

Various carts are used in the companies, but can use the cart which dimensions resembled for other models.
I have M1921(MGC) of a type to use paper gunpowder.
I can use a CP cart in this.
In addition, because an original cart of M1A1 of Hudson was close in dimensions, I remodeled one copy of a model gun and I was common and was able to use a MGC.45ACP rial size cart.
Dimensions of each cart are just what I did it.

Hudson CP
http://members14.tsukaeru.net/toku/model%20smg%20cart%20page6.html

MGC CP
http://members14.tsukaeru.net/toku/model%20auto%20cart%20page18.html

that it is made the cart which I have elsewhere a table on the following page
http://members14.tsukaeru.net/toku/sub%20cart%20page1.html

Post by Mark

Hi Toku,

Thanks for the cartridge charts! They will be nice to refer to when I look for cartridges for obscure and rare modelguns.

I have used the late Hudson 9mm Sten cartridges in my Madsen after changing the Hudson piston for the MGC HW type piston as my detonator was not correctly shaped to work with the original Hudson piston .

The Hudson cartridges internal dimensions are 0.5mm larger I wonder why?

I have noticed that Hudson has been redesigning all of their modelguns and cartridges in the last 2-3 years. Have they noticed that they needed to redesign them because their modelgun sales where dropping ?