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Old 08-12-2017, 09:39 AM
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Hi:
I was firing some older reloads of mine (200gr SWC / 3.5gr Bullseye) in a M1911. A few of the rounds had fire sparks coming from the chamber end of the breech when fired.
Could this be caused by the case mouth not being crimped tight enough ?

*** The cases, bullets, and powder (like me) are old.

Thanks,
Jimmy
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Old 08-12-2017, 10:03 AM
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That's a pretty light load. I'd guess there was a good amount of blow by from the brass case not sealing in the chamber and that is what you are seeing.
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Old 08-12-2017, 10:11 AM
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^^^^ What he said. ^^^^

One of the reasons 1# of Bullsye powder in 1981 was enough for me, smoke and smut everywhere with cast lead bullets.
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Old 08-12-2017, 10:25 AM
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I use 4.5grs of Bullseye with the 200gr SWC, and I consider that a lite load.
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Old 08-12-2017, 11:07 AM
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That sounds like and awful light load for 200gr 45 Auto?
Perhaps not much sealing in the chamber due to low pressure and some flash back?
Karl
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Old 08-12-2017, 11:36 AM
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Fifty + years ago the 3.5gr of Bullseye was the standard load for target shooting.I loaded 10s of thousands on Star Machines using H&G #68 cast bullets.

These days I need to load 4.0gr under a 200gr hard cast bullet to get same functioning and accuracy.YMMV
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Last edited by StakeOut; 08-12-2017 at 11:38 AM. Reason: fix typo
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Old 08-12-2017, 11:54 AM
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If by chance you saved any of the cases, or get a chance to look at them
the next time you shoot that load, you might want to see if they
have any soot on them or are dark in color.

They might be just a little light in the powder dept.

They will work but you might also get a little better accuracy with a little more fps.
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Old 08-12-2017, 12:24 PM
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Jimmy, I would have to agree with the above answers, it sounds like a pretty light load and like you said they were old reloads, but I have shot some from 10 years or so ago and they shot fine so who knows.
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Old 08-12-2017, 12:45 PM
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Torun that light a load you have to run a pretty light recoil spring. That may not allow complete lockup depending on the slide/bbl fit.
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Old 08-12-2017, 12:47 PM
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Quote:
JBnTX wrote:
I use 4.5grs of Bullseye with the 200gr SWC, and I consider that a lite load.
So that other readers have a basis for comparison, the 2017 Alliant Reloader's guide shows a MAXIMUM load with a 200 gr LSWC to be 4.6 grains of Bullseye.
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Old 08-12-2017, 12:54 PM
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Quote:
jimmyj wrote:
Could this be caused by the case mouth not being crimped tight enough ?
Probably not.

As several others have posted, the load is light enough that the case is not expanding enough to get a good seal against the chamber wall and what you are experiencing are propellant gasses leaking around the case.

A tighter crimp can delay the movement of the bullet sufficiently to allow pressure in the case to build to where it does expand the case as the bullet starts to move, but for a case that headspaces on its mouth, the amount of crimping that can be done is limited before you start having problems from the case not headspacing correctly.
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Old 08-12-2017, 01:00 PM
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Quote:
Originally Posted by hdwhit View Post
So that other readers have a basis for comparison, the 2017 Alliant Reloader's guide shows a MAXIMUM load with a 200 gr LSWC to be 4.6 grains of Bullseye.
So even reducing the 10% for a starting load would have you at 4.15! That makes 3.5 almost another 15% more reduced
Yikes! probably getting some leading in the barrel too.
Karl
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Old 08-12-2017, 02:15 PM
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Quote:
Originally Posted by hdwhit View Post
So that other readers have a basis for comparison, the 2017 Alliant Reloader's guide shows a MAXIMUM load with a 200 gr LSWC to be 4.6 grains of Bullseye.
I threw that worthless Alliant loading guide in the trash a long time ago.
Alliant is a real disappointment in the loading data department.

I get on average about 780fps with that 4.5gr Bullseye load.


.

Last edited by JBnTx; 08-12-2017 at 02:19 PM.
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Old 08-12-2017, 04:27 PM
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Quote:
Originally Posted by hdwhit View Post
So that other readers have a basis for comparison, the 2017 Alliant Reloader's guide shows a MAXIMUM load with a 200 gr LSWC to be 4.6 grains of Bullseye.
My Lyman cast manual has 2 200 grain bullets. One of the loads does start at 3.5 it has the pressure as 6,900 CUP and a velocity of 645. The max is 5.6. The other load is 4.9 and 6.0. The 3.5 BE load is the lowest pressure and lowest velocity of any of the loads. I prefer light loads but 4.0 BE is as light as I'll go.

Last edited by reddog81; 08-12-2017 at 04:34 PM.
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