The re-birth of a Colt 1911

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alfsauve

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[Long war story]

No, this isn't about a WWII CMP gun, but about a 1970 (almost C&R) Mk IV 70 series.

Actually, I wouldn't even call it a 70 "series", this is one of the original 1970s 1911s.
Bought while still an E4 earning a whopping $3,000/yr from USAF. Had to have it. Local gun store out in the sticks of James Island, SC had a little range which was free for anybody to use. Evidently someone connected with the government, later found it was a BNDD(pre DEA) agent, would come to the range late Sunday afternoon, fire 50 rounds of .45ACP, then police his brass. I was working night shift so I would go to the range at 8am on Mondays and find 50 rounds of brass and a government box neatly sitting on the bench. After a couple of months of collecting brass, I bought some dies and reloaded 50 rounds of .45ACP, not having a gun for it. So as you can see I HAD to have a 1911 what with all that free brass. There weren't many choices in those days.

Hot off the press, a Mk IV, Series 70, and it never worked very well for. Part of it was me, but mostly I would find out later were my reloads. Over the last 50 years, I keep going back to it trying to make it work better. I did become better at shooting it, when it would shoot. But FTEx, FTEj, FTFs were common. Based on the number of bullets I've bought over the years I've put ~3,000 rounds of my reloads in it. I got interested in silhouette shooting and revolvers and well the old Colt was just a periodic experiment I kept working on.

This winter a good buddy of mine went to Gunsite for the 250 class. I asked what guns the class was using and what he carried. He said there was one revolver, six 1911s and the rest plastic 9mms. But what got my attention was he said, "One simply does not go to Gunsite with anything other than a 1911 .45ACP." I want to go to 250 and my interest is now re-peaked in 1911s. Buy a new one or finally figure out what was wrong with mine.

Last month I took it to the range with my reloads & 4 different brands of commercial ammo, determined to figure out what was wrong. It's the first commercial ammo ever shot through this gun. As you have guessed by now the 300 rounds of commercial ammo fired flawlessly. Atlanta Arms makes some 230gr expressly for USPSA and IDPA and that's just what I'm going to shoot from now on. No need to even worry about my reloads. I even shot one IDPA match in CDP class that week and beat out some of the SSP shooters. No problems with the gun, though my handling skills are a little rusty.

Now to fix it up, though some of this had been done along. Better sights. Skeletonized trigger. Rounded hammer. Longer tang. Longer mag release. Better grips. Extended Safety. (Did I ever tell you how much I hate fitting a 1911 safety? Fit, measure, file, clean. Repeat all afternoon. Then finally blue and final assembly.) It now feels like a dream, handles like a dream and shoots like a dream. Glad I stuck with it. Watch out 250 class and IDPA CDP.

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So the moral of the story is you're a lousy reloader?

Yep, I'll own up to that. All of my .45 brass is used range sweepings/rakings that I never cleaned, just sized and loaded. In my defense it worked well in all other, non 1911, guns, like a G21 and several revolvers. I'll start chamber checking though if I reload anymore .45s. Maybe even clean the brass ;)
 
Most all of my .45 ACP brass is range pickup.

Somewhere you're making an error in your process. Likely due to either crimp or bullet seating.
 
I shot a semi-custom Springfield Armory in USPSA competition. The crimp, as Texas10mm suggests, had to be exactly right to consistently feed 200 grain SWC. OAL is important too, so pay attention to both.
 
I am sure we could walk you through to usable reloads.
I have given up on semiwadcutters, though. Some guns feed them, some don't, even with gunsmith attention and endless fiddling with details.
There are 200 grain roundnose bullets, so the fine old loads still work.
 
Not all semi-wadcutters for the .45 ACP are the same. The gold standard, the H&G 68 has a slightly shorter nose than some other options.

The RCBS 201-KT and the Lyman 452630 are my two favorite SWC for the .45 ACP. They both have a longer nose.
 
beautiful colt you have there, alfsauve. I didn't see a new recoil spring in your post. just want you to have a good experience at gunsite.

luck,

murf
 
....I didn't see a new recoil spring in your post.

I may have, I'll have to look through my part bin. If I haven't I may try different springs just to see. I've tried a number of things, include a recoil plunger that was a pneumatic buffer. I wore it out and they don't make it anymore. To bad I'd like to try that again. The one part I worry about most is the barrel bushing. So far mine has held up.

And you stuck with the arched mainspring housing! Good man.

Ah, well, er. I did try a flat housing for awhile. All part of a 50 years or learning and evolving with this gun.
 
I am sure we could walk you through to usable reloads.

I'm sure I could figure it out, given time and motivation. Right now I'm happy with using my current stock of reloads for practice and factory ammo for competition. If that changes then I'll look at all factors including case dimensions, COAL, crimping and bullet ogive.
 
alfsuave

Glad to hear you stuck with your Series 70! Your new and improved Government Model looks great! I have an old Detonics recoil spring assembly which helps to cut down on felt recoil in any 1911 that I use it in. Do you still use the original collet bushing or did you replace that?
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I'm sure I could figure it out, given time and motivation. Right now I'm happy with using my current stock of reloads for practice and factory ammo for competition. If that changes then I'll look at all factors including case dimensions, COAL, crimping and bullet ogive.

You may have a tight chamber in your Colt if only factory will run through it. Fat cases and tight chambers are nothing new, and a sizing die on a standard press does not have the capacity to reduce case heads if the brass was too fat before sizing. That is one reason competitive pistol shooters are willing to pay $1898 for a roll sizer:



As you can see, the equipment in the video is serious heavy duty stuff.
 
I have a Springfield that does this. Oal at 1.268-1.275, and running around 830FPS makes it run perfect. I load shorter, or velocity much higher, and it crashes down quick.
 
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