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New powder lot….. #8737566 11/18/22 10:29 PM
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P_102 Online Content OP
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Knowing powder lots can be different, when starting with a new lot do you:

A) Load a few to see if any difference first.
*B) Load a few of several different powder weights.
C) Start all over with a ladder test.

* since any variance is probably small, do you use .1 gr. Increments?


Do not trifle in the affairs of dragons, for thou art crunchy and taste good with ketchup.
Re: New powder lot….. [Re: P_102] #8737617 11/18/22 11:31 PM
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start with A...go to B (I try to chase the velocity)...sometimes that doesn't work and then I go to C or sell the gun grin


Originally Posted by Phil Robertson
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Re: New powder lot….. [Re: P_102] #8737729 11/19/22 01:22 AM
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Load your current charge for groups.

And load .2 gr less, .4 gr less for groups.

And load .2 gr more, .4 gr more for groups.

Somewhere in there is probably your old load. Different powder charge, or same powder charge, same consistent shooting, probably at the same speed.


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Re: New powder lot….. [Re: P_102] #8738208 11/19/22 06:48 PM
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On medium size cases +/- .2 grain has always worked for me. On a 7mm Weatherby Mag I had to go +/- .4 to find the load. That was with H4831 SC.


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Re: New powder lot….. [Re: P_102] #8738320 11/19/22 11:03 PM
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Re: New powder lot….. [Re: P_102] #8738340 11/19/22 11:25 PM
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Oh hush, Buzz. You just sold a gorgeous, great shooting rifle (with factory loads) that you never even went to the trouble to load for and find out just how good it could be. Imagine if you loaded for it and it shot itty-bitty groups (1/2 the size of the factory ammo)…..you could sell it along with 200 of those loads and maybe not lose that $1300+.


Do not trifle in the affairs of dragons, for thou art crunchy and taste good with ketchup.
Re: New powder lot….. [Re: P_102] #8738358 11/19/22 11:49 PM
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Re: New powder lot….. [Re: P_102] #8738505 11/20/22 03:26 AM
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Originally Posted by P_102
Oh hush, Buzz. You just sold a gorgeous, great shooting rifle (with factory loads) that you never even went to the trouble to load for and find out just how good it could be. Imagine if you loaded for it and it shot itty-bitty groups (1/2 the size of the factory ammo)…..you could sell it along with 200 of those loads and maybe not lose that $1300+.


Preach!


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Re: New powder lot….. [Re: P_102] #8739685 11/21/22 11:45 PM
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Re: New powder lot….. [Re: J.G.] #8740288 11/22/22 10:08 PM
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Originally Posted by J.G.
B

Load your current charge for groups.

And load .2 gr less, .4 gr less for groups.

And load .2 gr more, .4 gr more for groups.

Somewhere in there is probably your old load. Different powder charge, or same powder charge, same consistent shooting, probably at the same speed.


This^^^

What I do is a little different but close to the same. I load one of each from a half grain under to a half grain over in.1 increments and shoot them through the chronograph. When I find the charge(s) that produces the same velocity I test that load for groups and consistency. That usually works for me.

If I have to fall back to C I will but it seldom happens.


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Re: New powder lot….. [Re: P_102] #8740318 11/22/22 11:02 PM
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I’ve had Varget that was significantly different.

Re: New powder lot….. [Re: P_102] #8740802 11/23/22 04:00 PM
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just loadem up. no need to reduce charge on Varget lots


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Re: New powder lot….. [Re: Buzzsaw] #8740938 11/23/22 06:18 PM
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Originally Posted by Buzzsaw
just loadem up. no need to reduce charge on Varget lots


Wrong.


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Re: New powder lot….. [Re: J.G.] #8741002 11/23/22 07:44 PM
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Originally Posted by J.G.
Originally Posted by Buzzsaw
just loadem up. no need to reduce charge on Varget lots


Wrong.



Yeah I wasn’t even going to respond to that.

Re: New powder lot….. [Re: P_102] #8741017 11/23/22 08:01 PM
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