30-30 Max load differences

[Uncle Ed]

The measurement I gave in my previous post was the average of 20 fired cases.

Post # 19 explains the measurements in more detail & shows me that the cases are within SAAMI spec.

I thank you for the additional info. The commentary puts everything into the proper perspective......

No problem, been to Trops many, many times. Was your 30-30 new or used and what year did you buy it.

Below two of my rimmed favorites, the 30-30 is the trapper model with a 16 1/2 inch barrel.

And below my 30-30 cases never do this at 42,000 psi, but at 49,000 psi the .303 British case will stretch and have case head separations.

 

[OleGreyGhost]

It was purchased used approximately 15 yrs. ago. Been sitting idle ever since.

But that is soon going to change.....

 

[nicholst55]

You will encounter the exact same situation shooting US factory ammo in the 7,92X57mm Mauser (8mm Mauser). American ammo makers assume that shooters are too stupid to insuire that they have the correct ammo for their rifles. Older 8mm military rifles have a nominal .318" groove diameter; newer ones have a .323" groove diameter. US ammo makers load their ammo to low enough pressures that shooting the larger diameter bullet in the smaller diameter barrel will not cause catastrophic failure. Primers protrude after firing, as a result. European ammo makers do not do this, and load the cartridge to it's potential. They figure that it is incumbent upon the shooter to buy the correct ammo for his gun. What a concept - personal responsibility!

 

[David Milisock]

Looking at the big differences in max loads for 30-30 using 150 gr bullet with IMR 4064. Lyman 49th edition states 31.5 gr as max. Hodgdon states 33.3 gr of IMR 4064 as max. Looking back at Lymans 44th edition has it at 36.5 gr of IMR 4064 as max. I knew there would be a difference between sources but didn't expect this. Any input would be appreciated. No pressure signs so far at 31.5 gr, but before going further wanted to see what you guys thought.

Not knowing the state of your rifle I'd ask this. At the current load what velocity does the load clock? With a lower speed and no pressure signs you can try 1/2 grain increases watching for pressure signs and checking velocity.

Remember this a 30 30 is in many peoples opinion a damn fine short range deer cartridge and the lever guns it's usually chambered in damn fine short range rifles. It can't be improved on by pushing pressure!

 

[gambleone]

Not knowing the state of your rifle I'd ask this. At the current load what velocity does the load clock? With a lower speed and no pressure signs you can try 1/2 grain increases watching for pressure signs and checking velocity.

Remember this a 30 30 is in many peoples opinion a damn fine short range deer cartridge and the lever guns it's usually chambered in damn fine short range rifles. It can't be improved on by pushing pressure!

Thanks for the reply. Not using a chronograph, but so far i have no pressure signs. I posted this mainly because I couldn't believe the max pressure differences between the different loading manuals.

 

[David Milisock]

Thanks for the reply. Not using a chronograph, but so far i have no pressure signs. I posted this mainly because I couldn't believe the max pressure differences between the different loading manuals.

The mechanical variables multipled by the lawyer factor can have the affect on nook data. I recommend a chronograph for safety because sometimes you get oddities and a clock check adds a measure of safety. The weird ones are when you get pressure but not expected velocity.