How much to reduce powder charge when changing primers?

T

txsendero

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Nov 29, 2007
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461
Location
Humble, Texas
I'm shooting 7mm Rem Mag, WW brass, 71.9 gr Retumbo under 168 gr Berger VLD with Fed 215magnum primers. How much should I reduce the powder charge before working back up if I want to try WLRM primers? 1 grain? 2 grains? I am trying to find out if the change in primer may give me better ES.
Thanks
 
B

boomtube

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Oct 8, 2007
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Location
Mountians of SW NC, near Asheville
Are your present loads on the ragged edge of blowing your rifle apart?

If not, you really don't NEED to reduce the charge at all.

Or, you could just reduce by 3.4 grains and see what happens. ??
 
johnnyk

johnnyk

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Dec 24, 2001
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Location
Potters Hill, NC
I usually treat it like a totally different load. I start at the minimum and work up to max. JohnnyK.
 
royinidaho

royinidaho

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Joined
Jan 20, 2004
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8,950
Location
Blackfoot, Idaho
I just change primers and let'er rip. However, you may wish to consider differently when going from standard to magnum.
 

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