What is needed to convert 1991a1 to 357 sig?
- Thread starter Kermit
- Start date
CastleBravo
New member
Probably more than you are willing to do, unless it is already in .40 S&W.
Not a good idea.
When you consider the 1911 was built around a low pressure round, jumping up to a 40K PSI round is not good for the gun, its longevity, or your pleasure in shooting it.
The 9mm conversions are okay.
And many like the 40SW conversions.
But to go 357 sig or 10mm, you can but you shouldn't.
When you consider the 1911 was built around a low pressure round, jumping up to a 40K PSI round is not good for the gun, its longevity, or your pleasure in shooting it.
The 9mm conversions are okay.
And many like the 40SW conversions.
But to go 357 sig or 10mm, you can but you shouldn't.
1911's seem to do just fine with hot rod 38 Super IPSC loads, the 357 Sig doesn't come close to what those guys shoot. Recoil will beat a 1911 up more than pressure and the 357 sig isn't going to recoil more than a hot 38 Super or 9x23.
Winchesters load data shows standard pressure 9mm up to 32,900 psi, they list the 357 Sig at 33,000. If pressure was the problem the 1911 wouldn't hold up to the 9mm either.
It may well end up being cheaper to just buy a new gun chambered for the 357 Sig than to try to convert your 1911, but it seems most custom things people do to handguns are based on "want" rather than what's practical.
Winchesters load data shows standard pressure 9mm up to 32,900 psi, they list the 357 Sig at 33,000. If pressure was the problem the 1911 wouldn't hold up to the 9mm either.
It may well end up being cheaper to just buy a new gun chambered for the 357 Sig than to try to convert your 1911, but it seems most custom things people do to handguns are based on "want" rather than what's practical.
Kermit,
I don't know what all would be required to change a .45 ACP 1911a1 to 357 Sig, but I wouldn't be worried about the frame handling it. As someone else pointed out, some of us have 38 Supers and 9x23 Win 1911's that handle it quite well.
I have a Dane Burns conversion that is excellent. It started life as Colt Custom in 38 Super. Dane had to change the spring, the extractor and the barrel. What else I don't know.
I have fired a few rounds as fast as 1800 fps with 124 gr Hornady bullets. I don't do it often, but most of the time I shoot the same bullets at around 1500 fps. I doesn't seem to be causing any problem at all.
Casey
I don't know what all would be required to change a .45 ACP 1911a1 to 357 Sig, but I wouldn't be worried about the frame handling it. As someone else pointed out, some of us have 38 Supers and 9x23 Win 1911's that handle it quite well.
I have a Dane Burns conversion that is excellent. It started life as Colt Custom in 38 Super. Dane had to change the spring, the extractor and the barrel. What else I don't know.
I have fired a few rounds as fast as 1800 fps with 124 gr Hornady bullets. I don't do it often, but most of the time I shoot the same bullets at around 1500 fps. I doesn't seem to be causing any problem at all.
Casey