Don't have a chrono handy, need to guess velocity for this .45 load


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Correia
August 25, 2003, 06:03 PM
I need to get an approximate guess on the velocity of the following load.

200 grain lead semi wadcutter over 4.7 grains of bullseye.

This is going to be out of a 5 inch 1911.

I just need some educated guesses. I have not had a chance to chrono this load as I don't own my own chronograph, and I'm trying to figure out if it will make sufficient power factor so that I can use it in a state match next month.

Thank you.

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HankL
August 25, 2003, 08:35 PM
Larry, Lots of variables here but I would guess around 830-840 fps. I would hate to just use a guess prepping for a state match though.

Mal H
August 25, 2003, 08:44 PM
If I were a betting man (ok, I am), I would put my money on what Hank said. Checking the Midway Loadmap (they've been fairly accurate in the past), the range for 4 different 200 gr. lead SWC's and 4.7 gr. of Bullseye is 820 to 848. Their test gun was a Universal Receiver, but it was 5" in length.

Johnny Guest
August 25, 2003, 09:55 PM
Concur - - -

Speer Reloading Manual Number 12 lists 4.6 of Bull as 807, from a SiG P-220 with 4.4" bbl. 835 wouldn't miss it much.

Mal - - I'll take ten bucks worth of the action, if you can find any . . . .

:p
Johnny

HankL
August 25, 2003, 10:00 PM
Ok Mal, I have some 200 gr. SWC from Allen's Ammo, a bunch of clean Remington brass, some CCI 300 primers, plenty of Bullseye an Oheler 33 and several 5" 1911s.
What's your bet?
Of course we will need to wait for Katie to go to sleep before we can get any data. :uhoh:

Johnny Guest
August 25, 2003, 10:13 PM
Average of five shots, 835, plus-or-minus eight fps, from a non-ported five-inch 1911. Even money. Dunno how you'd go about giving odds on such a bet, but I'm open for suggestions.

Bet's off if Katie stops you before five non-flashing readings . . . .
:D

Johnny

HankL
August 25, 2003, 10:24 PM
Johnny, Katie is yawning right now and I have the rounds loaded. :)

Mal H
August 25, 2003, 10:51 PM
I'm going with 831 avg. (Rem brass is notoriously looser than some others.)

Now Johnny, you can't go with a range! I tried that once at the track. "I'll put a bill on #11 to win, plus or minus 4 horses." The cashier just looked at me kinda funny and closed the window.

:D :D

C.R.Sam
August 25, 2003, 11:10 PM
Not bettin
Lyman, old, says that load max and 900fps.
Lyman 46 says 5gr is max and gets 860

Sam

HankL
August 25, 2003, 11:10 PM
Larry, PF=164.88

This was fun.

C.R.Sam
August 25, 2003, 11:14 PM
Cool.
Even NASA can't do what gets done on this board.
Rapid and accurate solving of problems, cheaply.

Sam

HankL
August 25, 2003, 11:30 PM
Sam, I didn't know that cool was in your vocabulary!

Mal H
August 25, 2003, 11:40 PM
So the velocity was around 824 fps?

HankL
August 25, 2003, 11:57 PM
Avg. 832 fps. 8 rds. 11 sd. Colt 1991 with stock barrel at 10 ft.

Mal H
August 26, 2003, 12:02 AM
But, but ...

Wouldn't the PF be 166.4 for that velocity?

HankL
August 26, 2003, 12:16 AM
Mal, Please accept my apology if my math was not correct. Does the PF still meet Larry's needs?

Johnny Guest
August 26, 2003, 12:37 AM
Hank, thanks for the rapid chrono service..

Mal, looks as if you were a tiny bit closer than my guess. I'm satisfied, estimating to within 3 fps. Too bad we couldn't find someone to bet with us.

Does it still take 170 to make major?

Best,
Johnny

E357
August 26, 2003, 12:43 AM
:) :)

Correia
August 26, 2003, 10:48 AM
Wow! You guys absolutely rock. :D

I need 165 PF. Sounds like I'm hovering right around it. I will have access to a chrono a little later, but I have a chance to load up a bunch of ammo this week. I'll probably bump the load up a bit just to be on the safe side.

You guys are great. Thank you.

Mal H
August 26, 2003, 11:50 AM
I think 1/10th of a grain would do the trick. But then again, they don't really monitor the PF there do they? Isn't it sort of an honor system thing?

Correia
August 26, 2003, 12:50 PM
Usually it is just an honor system thing. But this is the State match, so I think they will probably have us chrono. I knew I was close, I just want to be sure though.

Thanks once again guys.

Edward429451
August 26, 2003, 01:24 PM
Its my understanding that ambient air temperatures will affect velocities and subsequent PF.

If you load and test your ammo on a nice warm day to barely meet PF requirements and they are ok, then when you show up on match day and it happens to be cool...you might not make PF.

Something to keep in mind.

stans
August 26, 2003, 01:54 PM
You guys are kind of over simplifying the quest for the perfect match ammo. First, you must consider the barrel. Just how smooth is that rifling? Just what diameter is the bore? How about groove depth? Sharpness of the rifling? Exact length of the bore? Uniformity of the bore and rifling? Chamber dimensions? Is the chamber perfectly concentric with the bore? What about the throat? Headspace? Impact energy of the firing pin and the consistancy of the impacts? I could just go on and on, but if you send your gun and your requirments to NASA, they should be able to figure out exactly what you need by oh, probably the year 2035.:rolleyes:

Correia
August 26, 2003, 02:14 PM
Stans! I'm only a Sharpshooter! I'll leave the NASA stuff to the Master class guys. :D My quest for the perfect handload ended around "well that one don't jam, its nice and cheap, and it lands about where I point it." :p

HankL
August 26, 2003, 02:50 PM
FWIW
Temp last night was right around 80, The barometer was around 30, humidity was high and the elevation is 320' IIRC.

Mal H
August 26, 2003, 02:56 PM
Doggone Hank! We are almost half a continent apart and yet the conditions were almost identical last night including the elevation - we are at 365'.

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