Is it physically possible to cut a chamber...

[ccoorreeyy]

I posted this in the gunsmith forum, but since it would be in a handi rifle and some of you know your stuff ill post it here also.

Is it physically possible to cut a chamber to work with both the 450 marlin and the 45/70?  I have it in my head that it might work.  I know when a 45/70 case was in the combined chamber a void would be where the belt from the 450 would be and when the 450 was chambered the larger case head of the 45/70 would make a void there, but im guessing the 450 would head space on the belt and the 45/70 could head space on the rim.  What do yall think?  would the 45/70 case split when it fireformed to the 450 belt area?   

[Datil]

 I am NOT a gun smith, But MHO DON"T try it. I think you would have other
 problems, ejection. I have never sen 450 mag case, and not expert.
 Marv.

[Badnews Bob]

Why?  I don't think you can anyhow the .450 Marlin was designed so you couldn't shoot the hotter rounds out of an older .45-70 that couldn't handel the pressure of hot .45-70s, You can load them both to the same loads just some rifles can't handle the pressure.

[Mac11700]

Is it physically possible to cut a chamber to work with both the 450 marlin and the 45/70?

No...it's not possible...They are 2 totally different types of cartridges...and the dimensions are too far off...

would the 45/70 case split when it fireformed to the 450 belt area?   

In all likelihood it would rupture...and that would be a very bad thing to happen to you...

My question to you is " Why would you want to do this? " There would be no benefit to doing this...and a real danger if you would ...Even if it would somehow stay together...your brass would be ruined...and you would have to ram it out of the chamber...If you want a 450M with a girdle...then buy one...but most folks already know a 45-70 will out preform a 450 with good hand loads anyways...and not have to worry about loading for a unneeded...over sized girdle in doing so...

Mac

[gould]

Mac has a good point you can load a 45/70 up to make the 450 look sick. The problom is you wont want that kind of beating. The only thing a 450 is good for is people that don't reload and want more power then factory 45/70. If you want to buy hot 45/70 try the Garret Hammer Head hard cast. 405 grain the heaveyer bullets might not chamber with out a throt job on the Handis.

[ccoorreeyy]

Don't want to hand load.  Already been that rought and did not shoot enough to support it.  Just wondering.  I see a great benefit in doing this if it would work.  I have a couple of each and if by chance I ran out of one ammo on a hunt I could use the other.  I don't care about the brass, it goes in the trash after I shoot it anyway.  I think the area where the belt void would be around the 45/70 the case wall is solid where the flash hole is and should be strong enough not to rupture. Not sure but I still think this might work.  I am in the process of overlaying the 2 case dim's in autocadd to see what the differences are and what it would take to make it work.  Won't proceed if its not safe!

[Mac11700]

Well let's see...The 450 is ...=.532" on the belt..and =.512 in front of it...at =.280 from the rim the 45-70 is ..=.504" at the web...and ..=.504 in front of the web at=.200" from the rim...so...how are you going to make it work? Your not working in the strongest part of the case with a 45-70...The brass will most likely rupture...

People have turned the rims off magnums for making cartridges...and have added rims to non-belted cases to make magnum cartridges...but they don't shoot non-belted magnums in the chambers cut for the belts...and for a darn good reason...

Mac

[quickdtoo]

Corey,

I agree with Mac, you're playin with fire here and looks like a good way to get burnt!

Tim

[stimpylu32]

The x2 rifle idea may work , but this one may just flat get you killed , better to not even thing about it !!!!!!!

stimpy

[Weissen]

Danger Will Robinson!!
Don't do it.
 
The head of the 45/70 case will seperate and that is really bad!

[ccoorreeyy]

Ok, ok, ok I've cleaned my ear's out and hear you guys loud and clear.   Idea deleated from vast emptyness in my head.  But get ready, i'm sure it won't be long before the next "why would you want to do that " idea spins out.    Next time I don't mind if you guy are just blount  and don't beat around the bush so much. lol

corey

[quickdtoo]

 

[handirifle]

It only takes one GOOD idea to make someone a genius, but it only takes one's total disregard of good advice to get onesself killed.

I think scrapping this idea is a wise choice.  Keep thinking, but always bounce the idea off others, especially in areas like that one.