I'm going to have a use small pistol magnum primers until I can locate or trade for some standard SP. I'm starting from scratch anyway so I'll start low, but I'm curious if any powders react differently than others when used with mag primers in general. I'll be selecting from W231, Unique, Bullseye, and 700x. Got a couple others that I used in 10mm but I think for this application the four listed make most sense. Leaning towards Bullseye, but I have a bunch of 700x. Not looking for a barn burner load, just something that will shoot 110 and 135 lead bullets accurately and reliably. So other that starting a touch lower, anything to look out for?