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Creighton Audette method for developing loads?

 
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Old 10-05-2003, 02:15 PM
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Creighton Audette method for developing loads?

Just curious, does anyone here know of or use this method for load development?

I imagine it would be very revealing operating at longer ranges than most shooters confront.

I would like to try this method to find out what my new rifle "likes" also because I have plenty of time on my hands till I get around to actually shooting it...
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Old 10-05-2003, 03:54 PM
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Re: Creighton Audette method for developing loads?

I use the ladder method also. I do repeat it more than once to confirm the results tho, three times is best. My Father likes to do it with five shots groups at .5gr increments and compare POI changes, but to each his own I guess. I'll post a pic of his target from yesterday when he was testing a load in his new Armalite AR-30 300wm. Nice barrel on it that hardly even fouled too, shot real well ta boot.

When I get the barrel broke in on this 30-338 LI, I think I'll do my ladder testing at 500 yards this time, although MV will play even a larger role than it would at 300yds, group spread would wider and might help to see distinct clusters in the group even better.

[ 10-05-2003: Message edited by: Brent ]
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Brent Moffitt
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Old 10-05-2003, 08:27 PM
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Re: Creighton Audette method for developing loads?

What is this method, I have never heard of it? [img]images/icons/confused.gif[/img] [img]images/icons/confused.gif[/img]
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Old 10-05-2003, 09:32 PM
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Re: Creighton Audette method for developing loads?

505:
check it out:http://home.earthlink.net/~dannewber...addevelopment/

Regards martin
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Old 10-05-2003, 09:45 PM
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Re: Creighton Audette method for developing loads?

Go to post on this board, 12-24-02 under bullets, barrels and ballistic. Look for Ladder Method.

Works great but works best at 300-400 yards.
The intervals and clusters are real easy to distinguish.

BH
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Old 10-06-2003, 04:59 AM
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Re: Creighton Audette method for developing loads?

for those who have used this method, @ 300m, how much vertical spread should one expect over a 2, 3 or 4 grain of powder span?

I suppose the best way to go about it would be to have all your shots on one paice of paper, or a long sheet of plyboard, so you could to the shooting in similar conditions over a few days, weather permitting.

I was thinking of shooting each round with a .1grain difference.
Not because I think there will be any great difference, just so as to have more shots on paper and to highlight fliers or my own bad shooting and convetrsly, to highlight the groups in the ladder pattern.


Sound like a good idea?
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Old 10-06-2003, 06:09 AM
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Re: Creighton Audette method for developing loads?

I normally go to 400 yards and I us .2 gr increments. My jumps are normally about .75 to little over 1 inch. They will move up and then cluster for 3-5 shots and then move again and then cluster again. Each cluster is a sweet spot for tuning. over 3-4 grain ladder can get 4-5 sweet spots. pick one closest to your desired MV

Key points are:

1. clean white poster board target with small aiming dot at bottom. Easier to spot hits.

2. Must have chrono to plot MV for each shot

3. Mark each shot on minature target paper at bench as you shoot it. also another sheet to write MVs

4. Good highpower spotting scope is essential to see bullet holes at 400 with others near it. Must plot each shot individually on your bench sheet, only way to tell which shot is what.

5. Target will show clusters and when compared to MV records easy to see sweet spots and point of diminishing returns with powder.

6. take about 5 rounds at lowest powder weight to zero at 400 on another target right next to clean ladder target.

7. Start at lowest weight and go up.

8. Method only works with exact components used, ie cannot change bullets or primers in your load after and think it will be same, reshoot ladder.

BH

[ 10-06-2003: Message edited by: BountyHunter ]
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