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Ammo and Reloading Factory Ammunition, Reloading, Components, Load Data and more.

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  #1  
Old 08-20-2009, 5:55 PM
hung380 hung380 is online now
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Default Shot my first .45 acp reloads today and got questions

Got my data from http://data.hodgdon.com/cartridge_load.asp
Powder is w231
Primer CCI LP 300
230 gr. hornady FMJ-RN .451
Winchester case
4.8 gr. and OAL is 1.265 Crimped
Fired through HK USP 45 and here are some of the numbers I got from my shooting chrony alpha
FPS: 627,647,650,625,626,644,633,648.
Acording to the loading data I should be getting about 699 fps @ 4.3 grains
but im nowhere near that with 4.8 gr.
Tried some factory cci load and the numbers are a little more consitant @ 8 FPS difference.
First time reloading and everything is on the dillon 650 with dillon dies.
Does everything look ok so far? thanks for the help and tips
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Old 08-20-2009, 6:36 PM
AJD AJD is offline
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That seems a little low, but then again, regardless of the published velocity in the load data, that is a light charge of 231. Lyman lists 5.2gr of 231 as a starting load for 230gr FMJ with a 1.275 OAL with a velocity of 758 FPS. Max is 5.8gr for 849 FPS. Sierra lists 4.9gr as a starting load for 750 FPS, and 5.7 as max. But then again you're right about at the starting load for Sierra and 100fps slower. I don't know what to tell you. Did you seat the primers properly, as in just a little below what would be flush with the case? Then again your velocity numbers seem pretty consistent. Your gun/load combination may not be working as efficiently with that low charge weight. Load manuals can get you pretty close, but there are many other varibles at play and you have to find out what works best for your combo. Maybe someone else will chime in with some other thoughts.
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Old 08-20-2009, 7:57 PM
J-cat J-cat is offline
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Too little powder, too much crimp.
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Old 08-21-2009, 3:57 PM
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You might get a little more zip with lead as the jacket friction is considerable with such a light charge to start with.

Just as a reference with a common, inexpensive powder, I use 6.0 or 6.1 grains Unique on a 230 bullet for a standard mil-spec velocity of 830+ fps. 231 would be a little less, but certainly 5.x range.

my OAL length is usually a few thousands shorter than factory at 1.245" or so
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Old 08-21-2009, 4:07 PM
eaglemike eaglemike is offline
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Remember to look at the conditions the book used for the test. Many times they use a longer test barrel. You're also using a different chronograph.

A change of brass can drop or raise pressure, affecting velocity.

all the best,
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Old 08-21-2009, 7:33 PM
hung380 hung380 is online now
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Quote:
Originally Posted by J-cat View Post
Too little powder, too much crimp.
How can you tell if I have too much crimp? Thanks
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Old 08-21-2009, 7:35 PM
hung380 hung380 is online now
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Thanks alot for the feedbacks so far guys. This is helping me out alot. I'm gonna up the charges a little and go easy on the crimps and I'll report back. Thanks again.
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Old 08-21-2009, 7:40 PM
J-cat J-cat is offline
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Quote:
Originally Posted by hung380 View Post
How can you tell if I have too much crimp? Thanks
When you see the case mouth crushing the bullet shank.

This isn't a revolver round. All you have to do is remove the flare from the case mouth and no more. Let case tension hold the bullet.
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Old 08-21-2009, 7:59 PM
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You only need a couple ( 1-2 ) thousandths worth of crimp. Little more powder, you'll be there!
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Old 08-23-2009, 9:07 PM
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FMJ bullets won't crimp that tight, like the lead ones will.
For FMJ crimp should be .470 if you go tighter you'll be distorting the jacket and stuff.
Even for lead bullets, .465 is pretty dang tight, I don't usually go much below .467 to .468, making match or target rounds for a 1911.
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