I have been kicking around a 450Marlin bolt gun for sometime. Do not need one. Then I start thinking about necking it down. 416 and 375 would be neat. Then I start thinking hell Remington makes ultra mags and I can lose the belt. So now I kicking the idea of shortening a full size ultra mag brass so the AOL is the same as a 450Marlin. Has anyone done this? I do not care about practical. I am not trying to get out the flame proof suit, or get a big fight brewing. Just would like some thoughts and input. Just bored treestand or taking a dump type thinking. More powder than a short mag or 06 based, but not as beastly as a RUM. Thought process is enough powder to do big heavy bullets justice, while losing the tooth rattleing recoil. Maybe after some table top, if it seems to be a good idear, I might go the next step and Kiff will get a call and I will go hunting an action. Seems cheaper to start here.

There was a cartridge made on the .404 case shortened & necked to .458 called the .460G&A short. Sounds like what you would be looking for. A .450Marlin bolt gun makes little sense to me because it's only a bit shorter than a .458winmag. There would be a perf. advantage to the .460G&A plus no belt.

Could this be what you are thinking of?

http://www.accuratereloading.com/450vs.html

That is about the ticket. I would like to see some drawings on those to compare Always in search of the perfect rifle no one else has came up with LOL. Factory stuff is just as good if not better They are always less pain in the ass and more cost effective. Anyway how cool would it be to have an 8lb bolt gun with a 06size action puking 400grn 416 bullets at around 2400-2500fps. I need that alot to shoot 100lb whitetails LOL. I wonder if it has enough foot pounds to stop a charging mommabear, she will be pissed if I start another rifle anytime soon.

What about this one?

Hog Killer