Question on pressure.

natesfitness

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In my Lymans reloading Manual it shows max loads for a Marlin 45-70 around 25-27k pressure level, as I understand it the Marlin reciever is good to 40k. My question is, is it safe to load slightly beyond manual suggested max loads?
 
Well......is it safe to go ripping along in a speed boat at 150 mph and drive into water you don't have a chart for and you've never been in before ??? You "think" it's safe....it looks safe.....it very well might be safe....but, the real answer is, you're still in uncharted waters, you don't know for sure, and you're on your own.
 
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Most cartridges chambered in the Marlin leverguns produce 40,000plus psi including the .450 Marlin, the 45/70 is loaded light in factory ammo so that no one blows themselves up using heavier loads in old guns like the Springfield. It's all about potential lawsuits with the ammo and gun makers....How you load yours' is up to you!!
As an aside, does anyone know what pressure level the factory ammo is in the .338 that they are hyping so much? It's the same action as the 45/70s.
 
About a year or so ago, when I started to reload for the 45-70 Marlin, Johnn Peterson on here, sent me an issue of Handloader Magazine featuring reloading for the Marlin 45-70.
I can assure you, you can load WAY beyond the figures mentioned by the OP. I have the 22 inch barrel Marlin with a Limb Saver, but no way am I going to load as high as the authors of the articles did with all three versions of the Marlin 45-70. It is the only rifle I ever loaded for where it isn't the pressure of the rifle chamber I worry about, it is my shoulder! Actually, the hard push of the recoil, rather than a sharp "blow," causes your head to fly forward, rather than hurt the shoulder.
Natesfitness, if you PM me your email address, I will scan a page or two from Reloaders Magazine for you and give you some of the loads I have used.
 
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