Small primer pocket in .45 acp brass

No.

Start at the recommended starting load and work up, as always.

rc

Be sure to mark those sp primed casings. Some use a magic marker on the head. Get them mixed up and you will be crushing LP primers. I have a box or two of them set aside so they do not get mingled. Will be swapping them at some point.

http://www.thehighroad.org/showthread.php?t=649476

Beyond that- what RC said.

Texanforever said:

I found a good special on RWS .45acp brass. The brass has small primer pockets. I have 1000 small pistol mag primers. I load the minimum load of 5.0 gr. of Win231 with 230 gr. fmj bullets. Should I drop this load below the minimum for the mag primers?

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A starting charge is just that, the place to start. Magnum primers burn a little longer and a little hotter but will not create a nuclear explosion! If your normal charge id 5.5gr of a powder in the 45 auto with a standard primer I would wager a charge of 5.4gr of the same powder will produce the same velocity when set off by a magnum primer. Yes, there is that little a difference in primers.

As a matter of fact, Winchester produces only 1 LPP which is suitable for both standard and magnum primers and none of the load manuals have notations warning you to reduce the charges if you use a Winchester LPP. If there was a wide difference or any danger at all there would surely be a warning especially in these litigious times we live in.