FTL new 1911

New optic ready 1911. shoots zero factory 185 well.
when I try to shoot my lead loads, this happens.
185 magnus #801 (fed gm45 buttonose clone), 4.0 WST

or, should I just move on to the regular #811/814 which cycles fine.

It's junk. Just send it to me and I will make something arty out of it with my plasma cutter. No sense letting it go to waste.

Oh, thanks Len!!   I would, but shipping to you is sooooo difficult....

Hey makes collecting your brass easy.  Don

INDICATIVE OF A SHORT STROKE OF THE SLIDE. LOWER RECOIL SPRING WEIGHT OR UP LOAD TO 4.3 WST.

JIMPGOV wrote:INDICATIVE OF A SHORT STROKE OF THE SLIDE. LOWER RECOIL SPRING WEIGHT OR UP LOAD TO 4.3 WST.

I'll try both. I'm new at the optics on the slide thing....

I run 4.2gr WST behind Zero LSWCHP on the short line and 4.6gr on the long line. I have slide mounted Aimpoint micros with a 12lb recoil spring. If your running a heavier full size Ultradot go to a 10lb recoil spring.

Bill

All my new builds regardless of scope use 10# recoil spring and function 4.0 gr BE with 200 lswc. My barrels are hard fit so I can run 10# spring.
Jon

In all seriousness it is probably the bullet. Those button nose can be finicky. I have to load long to get the bullet to tip down and go in. The round will hang up on the case rim because it can.    Maybe not all seriousness. But try seating .030-.050 longer then you are now.

Len

Does pistol cycle the exact same load without scope mounted?
Jon

Jon Eulette wrote:Does pistol cycle the exact same load without scope mounted?
Jon

I'll try that too.

Did you try different magazines?  My 801 loads use .020" shoulder showing and they cycle fine out of Shooting Star and Tripp Research mags.

That picture gives me impression/assumption that magazine is releasing cartridge too late and not letting rear of case pop up in time to feed smoothly.
Jon

Jon Eulette wrote:That picture gives me impression/assumption that magazine is releasing cartridge too late and not letting rear of case pop up in time to feed smoothly.
Jon

Jon, would this be caused by a magazine spring being too 'strong' for the force being applied by the slide as it goes forward and tries to strip and chamber a round from the magazine?

No magazine lips are too long so cartridge cannot go up at right time to load into chamber correctly. Several other things start to contribute when releasing late as well.
Jon

From the picture my best "guesses" in order or probability.
1.  To much recoil spring for ammo being used.
2.  (in conjunction with #1) to much main spring for ammo being used.
3.  Light powder charge for set up on pistol.
4.  Shooter induced, breaking wrist or somehow absorbing some of the recoil of the pistol not allowing the recoil spring full range of motion.

Possibly load the 801 out a bit longer. How is the accuracy of that load in your pistol?  Everything points to light powder charge for that particular load since you can shoot others without any problems.

Thanks for the tips. I know it's difficult when not in your hands.
I'll try them all.
I tried to lengthen it .030, it jams the rifling.
On to the next.
I know the #811/814 bullets hand cycle well, so I think I'll work up a load for them first then try the #801 again.

I should be retired so I can just test, but, then I couldn't afford too!

Simply put your loads are creating the problem since the gun works OK with other loads. However the 1911 self loads as the result of various movements caused by the delayed blow-back. Changing the ammo will change the timing, if the slide does not go as far back as with other loads the load in the magazine may not allowed to come up or with the shorter time created by the shorted travel to have enough time to rise to an acceptable level. KC is correct in saying that everything points to the particular load creating the conditions you have. It may be corrected by reducing the recoil spring weight but I avoid that because the most important recoil spring weight is at when the slide is closed. If the slide does not return to the same location when closing accuracy will suffer. You might consider a lighter main spring that effects the opening but has little effect on closing and none at the point the slide is off the hammer. But changing it too has "side effects" Light hit and trigger pull are a couple. And as KC said in #4 shooter induced, a slight change in the hold will effect a lighter load more than a heavier one. The AMU did have a lighter short line load until they mounted the 9000SC. The added weight created a situation similar to yours if the shooter changed his hold slightly while shooting. Yet the slight hold change didn't result in a problem with the heavier load. Keep in mind when you start making changes you will create unintended consequences. It may be be easier to adjust the load to fit the gun being that it works OK with your other loads.

Thanks, good points.

Maybe an increase in the amount of crimp for that particular bullet?

Trying that too.

What type of lips are on your magazines?

801's short nose can be problematic but I use Check Mate hybrid magazines and shoot Magus 801's in 4 different 1911's and never had a FTL problem in any of them w/ 3.8 of BE. Only FTL problem I've had with the 801 is in a S&W 45 Shield.

Virgil

Jon Eulette wrote:All my new builds regardless of scope use 10# recoil spring and function 4.0 gr BE with 200 lswc. My barrels are hard fit so I can run 10# spring.
Jon

Jon,
can you explain what you mean by " my barrels are hard fit " ?
Ron

Snap out of battery: close fit of hood, upper barrel lugs and bottom barrel lugs to slide stop. When they get some mileage put on them it eases up on how hard they come out of battery. Tighter fit slows the slide down more which allows use of 10# recoil spring.
Jon

Got it, I appreciate you explaining that sentence.
Thanks
Ron