Harter one more thing to play with in your rifle is 459 bullets. Back in the day before the big heavy bullet 45 colt thing kicked off and molds became common place many of us sized down or 4570 bullets to get heavys. Sometimes it took having two dies one a 452 and a 455 but what Id do is compromise and use a 454 die and just one swipe through the start. IF I had a gun they wouldn't chamber in (tight throated FA 454s mostly) Id then size to 452. But most rugers ran the 454s just fine. Ive shot many a one to two inch 50 yard groups with those sized down bullets. For you it would give you access to heavies without going the custom mold thing.