Hi , This is the same Richard Wilson that made my Marlin. With the .357 case head being roughly the same size as 10 mm mag/10 auto/.40 S&W the mag tube is the right size and I don`t think there is much of a problem with the extractor. With the right loads it will shoot 155 grn bullets at nearly 2000 fps.

Hi Guy,I have a .45 acp Enfield that runs on Glock mags and this works very well. I also have a Marlin in 10mm mag that Richard Wilson made for me. He converted a S&W 610 to 10 mag back in the mid 90`s but I had to hand that in during the pistol ban.

I have a Marlin in 10mm Magnum that I had converted in 1995 from a .357 as the cartridge length an base
diameter are the same so only a barrel change is needed and at the time I had a S&W 610 done also but I lost that in 1997 when the British Government banned them. I also have a .41 Marlin that I bought a few years earlier than the 10mm, it was a good few years old when I got it but it still shoots very well.