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Switching primers...

Discussion in 'Handloading and Reloading' started by altitude_19, Jul 30, 2010.

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  1. altitude_19

    altitude_19 Member

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    If you switch from one brand of primer to another, do you feel the need to re-work the load back up to what you had? For example, switching from Winchester LP to CCI LP: Would you start back at minimum load, or just keep using what you had?
     
  2. JimKirk

    JimKirk Member

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    Going from Win LP to CCI LP no, If I was going CCI to Win LP and loading border line Max loads, I may back down 2%, but not 10%. The WLP is rated for both regular and magnum loads.

    Jimmy K
     
  3. qajaq59

    qajaq59 Member

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    I just back it off a little and then come back up to accuracy. I don't start at the minimum however. It rarely seems to make a big difference in my rifles though.
     
  4. loadedround

    loadedround Member

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    I've seen very little difference in switching various brands of pistol primers. However I'm not pushing through maximum loads and mixing or matching various brands of primers.
     
  5. Walkalong

    Walkalong Moderator

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    If you are not at max, don't worry about it. I haven't compared the WLP & CC 300 primers, but with the WSP & CCI 500 primers in bigger cases with lots of extra air space I have to up the powder .1 or .2 Grs with CCI to get the same velocity. In small cases where powder fills 95% of the air space it did not seem to make much difference.
     
  6. bds

    bds Member

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    Loading for 9/40/45, Winchester LP/Wolf LP and Winchester SP/Magtech SP seem comparable to use the same charge load.

    For PMC "E" SP, depending on the powder, I need to use on average about 0.2-0.3 gr more powder to be comparable to Winchester SP/Magtech SP.
     
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