The fundamental birisance of standard and magnum primers within a brand is not significantly different. Brands differ.
The difference between rifle and pistol primers is significant.

IMHO, if you intend to use any and all primers and commercial ammunition in a carry revolver, lowering the double action pull significantly (below about 10#) is asking for problems sooner or later.
If somebody comes along and says he uses X springs at Y pull, that does not mean YOURS will work.

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Science plus Art