If you want a big bore 50 Beo or 458 Socom just keep in mind that the novelty may wear off
I originally put together on of each since local indoor range would not allow 556 at the time
Sure it had me grinning like a kid every time I cranked off round but reality is I shoot my 5.56 , 6.5 Grendel , 7.62x39 , 308 and 9mm Ar far far more now
You are not going to be running and gunning in match with a 458 Socom
I got rid of 50Beo and kept the 458 . As already mentioned , you have a huge selection of projectiles that are commonly used in 45-70 and 458 WM
I load the Hornady 325gr FTX and 500 Gr RN since I have lifetime supply I bought cheap for my 458WM
Don't worry about the magazine capacity for the 458 Socom some are mentioning in earlier posts
Just buy a single shot follower ( Sinclair( Brownells ) make a nice one ) and install it into a mag and rivit at location to fit 5 rds of the Socom
The single shot follower will not allow any other round to contact the feed lip so there is NO WAY any RCMP can accuse you of having a over 5rd magazine for 5.56 , 7.62X39 , Grendel
Oh , look ...no workee for 5.56
Well actually it does, I use these mags for 75 Gr Amax loads that are single load only due to COL
This is why they make these followers BTW