What is the biggest cartridge you can put into an 1895 marlin.I have a new cowboy in 45-70,but I want to get it in something different.I've read alot of different aticles on customized 95's.I've seen the wild west guns in 50 alaskan. I've seen 50-110's,the 450 alaskan.They say the 450 alaskan is just under the 458 Win..With the pressures it can take are all these rounds about the same.Can the beefed up 45-70 do about the same as the longer cartrides.Is it worth doing something different. Thanks,Dave.