The Tula primers Bart suggested are terrific and inexpensive. I've had some ridiculously low velocity SDs using them with IMR4064 and Varget, both. I'm talking single digits even into low single digits in a couple of test runs. A little harder to seat than average, but if you set your primer seater up to seat them about 0.004" deeper than where the anvil feet first touch down in the primer pocket (hard seating) they can be astonishingly consistent. I think Slamfire has a post showing the Wolf primers do much the same. I've seen it suggested they are made by the same plant, but haven't got verification of that.
Shush, there is a primer shortage on. If we keep on telling folks how good Tula primers are, there won't be any left for us!