I have only ussd relosder 15 for all my 416 rem mag loads .There is none to be found these days becsuse of the war in urikraine .I face the same problem with my 338-378 weatherby using r25 none to br found .I did buy the only keg of r15 this summer but its in Alaska .I hope both of them return .These to big rounds are keg eaters too use alot of powder.