1911 to 460 Rowland conversion [Archive] - Glock Talk


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12-31-2012, 23:22
Any one done the conversion? I bought 460 Rowland, LLC conversion kit. I am having pressure problems with Rowland's Johnny Duty rounds.

Conversion barrel locking lugs lock prefectly into slide locking grooves. Round drops into barrel and to the right depth. stripped down the barrel and round lock prefectly.


12-31-2012, 23:25
Used Springfield Ranger Officer for conversion. Here is pic of a round load into stripped down slide. prefect fit


12-31-2012, 23:29
Fired 12 rounds in conversion before I decided to think things over. Had three primers blown out. had one primer backing out. all primers were flattened more than I would have load them to.


12-31-2012, 23:35
see that dark ring on the left just under the exactor groove. this side of the case base expanded enough to look like a semi-rimmed case.

new case base mic'ed at the is 0.482". Expansion in shot Rowland cases went from 0.507" to 0.561". BTW a 45 acp case base mics 0.482" and a shot case base mics 0.482"

LOL......ya see why I stopped to think it over.

any ideas?


01-01-2013, 00:05
That's a little scary.:shocked:

What strength spring are you using?

01-01-2013, 00:30
That shell does look a little scary. It seems to me that your barrel is not locking up at the correct distance to the breach face. You may have barrel lug lockup but if distance is not correct you will not get a complete primer strike. Also, by looking at the casing it looks as if the casing is siting outside the barrel a bit. This is just my lamen observation. Lets see what everyone else thinks.


01-01-2013, 00:51
TKM it came with a 22# and 20#. I am using the 22#


Steel Head
01-01-2013, 08:59
Did you ever take one of the rounds apart to weigh and try to identify the charge?
May be a heavier spring is needed in your particular gun.

You had no problems with your own reloads right?

01-01-2013, 10:22
Steel head, that is correct. I have sent an email and pics to 460 Rowland, LLC. I will likely hear from them after the holidays. I was just wonder if I might have missed something although I am a pretty good with 1911 workings. been running a Clark Hardball for a lot of years.

LOL dang if i have to use a heavier recoil spring I am gonna have to start working out. Springfield has pretty stiff main spring. I already stopped load 8 rounds in magazines. Racking 460 on load and make ready I have to ware a glove and grab a whole handful of the slide. :) Old geezer