They do us a Sierra 190 Grain Match king....I am owrking on finding out the type of powder they use so I can experiment with non canister potential equivs
It said that it use Sierra MK 190gr with 42.1 grain of Bofors RP3 powder, Max cartridge length 71.1mm (2.8inch).
I have no idea what the Bofors RP3 is. However, searching the web shown that RP3 burn rate is approximately the same as IMR4064, Rel 15, N140 (source http://www.gsgroup.co.za/burnrates.html)
I ran some number through QuickLoad, and it looks like 42.1gr of 4064, and N140 would push the pressure up to the MAX (60,000 PSI.) So I don't recommend it. However, 42.1gr of Rel15 has calculated pressure around 56K PSI.
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