I want to work up loads for use in a Freedom Arms and Contender which are very strong guns. I was wondering about brass strength? If say a 357 Mag. is a 40,000psi brass is a 45 Super a 30,000psi brass? For all I know the Super brass may be as strong or stronger than the 357?

Bob

A good way to tell the relative strength is to section one to see how thick the case walls and web are. Section a 44 magnum to use as a comparison.

Ray

I ordered some for a mauser 45acp rifle project I was doing, because I thought I could load it to the hilt, being in a bolt rifle. I got clover leaf groups out to 65 yards, but after 75 they went off the target. I still need to get it back out and work with it, I think I was using to light of bullet. I did talk with the guy that does a lot of 45 super 1911's and all he gave me were start and stop loads.All I can Say is I had my 95 mauser hitting like a 223. compaired to my pistol loads, they were like shooting my red rider bb gun. Still nothing to call a group @100, which was my goal.

In the 45acp Mauser rifle I built 6 years ago, the threshold powder charge to cause primer pocket looseness in Starline 45 Super brass a the same any other 45acp brand brass I have tried.

It is higher than 50,000 psi and takes large rifle primers to get there.

Would hot loads in a 45 Super benefit by using Large Pistol Magnum primers? Probably not needed for ignition due to small case and powder charge but do these have thicker cups to resist pressure?

I was told they do have thicker webs in the base when I bought my 45 super brass.

quote:

Originally posted by Bob96:
Would hot loads in a 45 Super benefit by using Large Pistol Magnum primers?

Primer choice is dependent on the powder for pistol reloading.

quote:

Originally posted by mad_jack02:
I was told they do have thicker webs in the base when I bought my 45 super brass.

There has always been some discrepancy over the advantages of 45 Super brass. You can cross section it and compare it to other cross sectioned brass. You can weigh it. You can call the Starline and ask. You can even over load it until it fails and compare the threshold of failure to the threshold of other brass.

I have done all this.
https://forums.accuratereloading.com/eve/forums/a/tpc/f/...=782109774#782109774


What does it all mean?
You bought the 45 Super brass, so use it.


As for your other question about 357 mag brass vs 45 Super brass:
The 45 super brass is weaker for reasons:
1) More hoop stress with larger diameter
2) Large primer weaker than a small primer
3) Rimless case way weaker than a rimmed case


When you go by SAAMI registered cartridge pressures, you miss the common sense about the brass strength.
270 Win brass that is for a cartridge that is rated at 65,000 psi and is way weaker than 38 special brass that is for a cartridge that is rated at 17,000 psi.