I called CCI to try to sort out what was going on with the #34 primer and 4895 so commonly used with it in gas guns, and they told me it was not that they knew it was a bad combination, but just that they hadn't ever tested the two together themselves. For liability reasons they're not going recommend or suggest anything they haven't personally tested. But if you pop over to the CMP forums you'll find the two are used together frequently. Especially in .30-06 fired in the Garand.
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