http://www.reedercustomguns.com/information/GNR_cartridges.htm

has anyone tried the 457 gnr in a bfr???

talk about a wide range...

480 ruger, 475 linebaugh, 475 maxine and 475 gnr!

I have shot some 460 gr boolits and they shot OK. It has bee a while and I don't remember the load.

With such a big case you will need to use rifle powders.And the powder will never burn completely in a 8-10" barrel,so you will gain a little velocity but not nearly as much as you might hope for IMO.
I do have a TC Encore in 475 GNR -14" bll.I took a bison with it using a 460gr LFNGC at 1470 FPS.

Sean

it seems that maybe the long barreled t.c. pro would be the way to go...

for a real frankenstein project someone could turn a 45-90, 45-100, 45-110, 45-120 into a 475 version...

shove THAT cigar in yer t.c.

You sure don't need rifle powder! 296 is the very best. I shot mine today with both a home made 411 gr wfnpb and the Lee 400 gr. I hit slightly above center on the target with both at 50 yd's and centered a spray paint can at 100 yd's. Why is the case so big it needs rifle powders? The 460 gr I tried was very accurate with 296. I don't have a mould for it so I just shoot around 400 gr's.

OOPS, that is a big case! I would use 4759 in it.

I was thinking of the Linebaugh round.

475/480 (Sean)knows his stuff when it comes to handguns, cast bullets and loads. I would take his comments/advice seriously and would not have any reason to raise doubt.

Woody

Not doubt, I just mixed up the two different rounds. My fault!