Just picked up a PTR-91 GI (already knowing all the quirks about checking bolt gap etc so we don't need to go into that here) and I'm wanting to try 150Gr cast bullets in it. Are there any known reduced loads that will cycle the action? I doubt the 10gr unique load will work here. I have bulk military pull down powder I can always use but I'm just wondering if there are any other reduced loads that work well in these rollerlock rifles.