since i had one of my 1911s set up for 10mm and had tried 40 rounds through it and it all most worked with um i thought i would try again.
this time with a swenson/roto 40 barrel from midway and a new 40 ejector.
the swenson barrel looks good enough and it offers what looks to be full support for the 40 chamber -- if it ain't fully supported it is close. unlike other rotos this barrel looks to have pretty decent looking rifling.
the barrel link is a PITA to install --- way too small --after a bit of grinding, rotory tool, grinding and filing and three attempts to install the barrel link i finally got it in with the proper amount of friction.
everything else seemed to fit good so it was time to try a couple mags.
accuracy seemed very good although not quite as good as that stainless steel 10mm i got from numrich. soda can sized targets @ 10m and 20m are very easy to hit. i suspect it can do a 2.5" at 25M with ease.
recoil is sharp, ironically is seems sharper with the 180s in 40 than it does with 1200fps 180 loads in 10mm although a bit less noisy than the 10mm.
now for the bad part -- i had a few jam-ups like the ammo was weak, it couldn't get the brass ejected before loading another round, it seemed to jam more often with steel 40 than brass.
the good is it ain't beating up the brass like before.
i tried my best 45acp mags --the same ones that work well in 10mm and they will about half work.
looks like there is just enough taper in the 40s that the 45 mags just can't get enough grip to hold um back fully under recoil.
eventually i'll get some 40 mags. i think this will go a long way to fixing the jamming up problems with the 40 conversion.
it will get by ok if you short load the mags. there might be a friction somewhere as i just installed a new ejector that required a lot of fitting -- a lighter or possibly even stouter recoil spring may also help.
the test was run with a 18.5 wilson that should have been enough for a 40--
the 10mm so far looks like a lot less effort to convert over from 45--