That is a problem here. Finding BLR's with steel receivers for sale on the used market is rare. I have seen exactly 1 aluminum receiver BLR converted to 416 Ruger. They cut the barrel off but left I think about 10" or so of the barrel on the receiver. Then they bored and threaded the original barrel, and threaded a new 416 Ruger barrel to match. The company said the jigs that had to be manufactured to machine everything true were a major undertaking. This was done by a company called Aria Ballistics Engineering. I spoke at length to the owner of this company about converting a BLR for me to 458WM. He did not say "no", but did explain what a PITA these guns are to convert. I got the idea this was going to be a VERY expensive proposition, if they accepted the job. They were relocating their shop to another state at the time, and were not taking on new work. I haven't checked back since. If I recall correctly, the 416 Ruger converted rifle was offered on GB at around $4800. Very professional work. I had no idea the barrel had been "spliced" from the detailed photos. I only knew because the owner told me.
I never trust the Lee Factory Crimp Die without a cannelure on heavy recoiling rounds.
Now that looks interesting, I had a cheaper smaller unit when I loaded 10mm slugs in my 38/40 back in the day, I think 180-200gr XTP.
Of course you are correct about the Lee dies. My father wore belt and suspenders all his life. Although I don't dress like him, I guess deep down where it counts I'm a "belt and suspenders" man too.
