Marlin Guide .45-70 Pressure rating ? (CUP)
- Thread starter Puma
- Start date
- Location
- The Conservative part of Ontario
Don't push your luck. It's a strong design, but it's not a bolt gun.
On the new Hodgdon Powder Company site, it shows data for .45-70 Government (Lever Action)* between 18,600 to 40,000 CUP.
I dont "push my luck" when it comes to reloading.
With a spread of like that, I just wanted to know where the Guide Gun fit in.
I assumed it was one of the stronger ones, for a modern lever gun.
Anyone know where the Corbon ammo is CUP wise ?
Puma
I dont "push my luck" when it comes to reloading.
With a spread of like that, I just wanted to know where the Guide Gun fit in.
I assumed it was one of the stronger ones, for a modern lever gun.
Anyone know where the Corbon ammo is CUP wise ?
Puma
And Marlin's head tech says,,BBBBBBBBBBRRRRBBBBBB (that was a drum roll)
35,000 PSI operating pressure,proofed at 200%. If your rolling over those numbers with the 70,time to change guns,its not a 458 wm
35,000 PSI operating pressure,proofed at 200%. If your rolling over those numbers with the 70,time to change guns,its not a 458 wm
- Location
- The Conservative part of Ontario
I worked up a strong load in my 1886 Winchester that froze a friends Marlin. That's why I made the comment.
Proofed at 200%? well, maybe it didn't blow up then, but, my friend had to bang his open with a chunk of wood through the lever, so I guess their definition of "proof" is needed..
But then DarrylDB has used that load in his without issues.
I've since stopped using that load in the 1886. (Mine is a custom gun, not a typical 1886). I really don't need that kind of power.
Proofed at 200%? well, maybe it didn't blow up then, but, my friend had to bang his open with a chunk of wood through the lever, so I guess their definition of "proof" is needed..
But then DarrylDB has used that load in his without issues.
I've since stopped using that load in the 1886. (Mine is a custom gun, not a typical 1886). I really don't need that kind of power.
The same action is chambered for the 444 Marlin and Hodgdon lists max loads up to 44,000 CUP.
Hodgdon derives their data in tightly controlled laboratory conditions using measuring equipment most of us don't have or even have access to.
My guess is that their data has a pretty good safety buffer for the obvious safety reasons and also for liability reasons.
Why shouldn't I trust their published data?
What info do you have to dispute their data and do you have the test equipment and data to back up your info?
Good Luck
John
Hodgdon derives their data in tightly controlled laboratory conditions using measuring equipment most of us don't have or even have access to.
My guess is that their data has a pretty good safety buffer for the obvious safety reasons and also for liability reasons.
Why shouldn't I trust their published data?
What info do you have to dispute their data and do you have the test equipment and data to back up your info?
Good Luck
John
The problem with the lever guns and 45-70 is that there isn't a lot in the way of pressure signs (by the time you get even mild pressure signs in the 45-70 with its huge case head you're WAY WAY WAY over max). And there's not as many safety features as in a bolt gun. So you can go from seemingly normal operation to kB! in no time all
