Sorry you're leaving Smoking Joe I was hoping to pick your brain a little more. Your description is the same as mine but clarification is always better...there is just way too much wrong information, mis-information and just plain dis- information floating around the mall not to insist on somekind of clarification. Besides I'm way past the "No...because I said so" thing...I need the reasons why and some hard numbers to go along with it. And I wasn't advocating using any kind of loads beyond the capacity of the NEF RECEIVER....not sure where you got that from. The information I posted was from two software programs that agreed closely, plus checking through several of my loading manuals to see if the information was valid and was for informational purposes to indicate to Ty where he was headed. I'm the first to say stay within SAMMI pressure limits or if SAMMI isn't around use good reloading scense and follow what the manuals safety information states.
I was in the midst of mentioning the 500 S&W when Quick jumped on my horse, so I will let him run with it, other than to say 4140 steel which is used in the barrel and frame of the NEF CF's has a minimum strength in the 150 to 200 KPSI range depending on the hardening process. His calculations are the same as I came up with and physics teach pressure is equal on all surfaces in a volume. A cartridge case isn't a pressure vessel as it has one end open and the pressure is constantly reduced as the bullet moves down the bore. As I said before, my only concern is the underlug weldments and the hinge pin.
I did mess up about the 45-90 equaling the 458 Lott....I meant the 45-90 equals the 458 WM in CC, missed that when I was proof reading...hummmmmmm
All the interior ballistics programs I use calculate an 86% load for the CC of the case with a seated bullet and pressures around 45KCUP which is well below any problem areas for the most part...but there are always exceptions. I've been using these programs since the '60 and never had any problems with straight walled or bottlenecked cartridges, wildcat or standard, and my admonition to Start LOW and work up SLOW AND load to the capacity and parameters of the RECEIVER not the cartridge case still is valid and if you don't understand these words you shouldn't be messing around any kind of a reloading operation. All the software internal ballistics programs calculate on CASE VOLUME, bullet weight, bullet diameter and length and return results with a powder having burning rates to give that pressure...it doesn't matter what the case is per se. Besides straight walled cases actually grip the chamber walls better, but because most straight walled cases are lower pressure pistol or used in older rifles they only grip tighter if they are used in higher pressure modern weapons. You have to understand how to use internal ballistics programs the same as understanding how to use reloading manuals otherwise ugly will rear its head.
Losing Ty's load information is a good thing, I don't think personal load information should be posted unless it is also available in reloading manuals and I wouldn't feel any problem with GrayBeard losing any information I posted if he though it was dangerous or misplaced. I included the pressure information specifically as a warning but didn't come out and say it as such, I think I have posted my thoughts on safety in the other posts in this thread.
You can never know how questions or information is taken on these forums. Sometimes the most innocent meaning words or thoughts will stir up a hornets nest.
I load my BC to 48-50KPSI which is well within the receivers safety and SAMMI limits, and I can get all the velocity and recoil I need to satisfy my S&M needs with 525 gr slugs out of the 45-70 cartridge without needing to rechamber to a larger case,
and I get velocities I won't post just to keep those without full understanding from getting riled up...this is not any kind of flame to diss to anyone, it is from past experience and the understanding there are differing levels of understanding and knowledge.
Ty is walking near the edge as do many of us at times, and as long as his luck holds and the ground doesn't decide to crumble, the learning process will continue.
I'm almost sorry I posted anything...information seems to get twisted around just like the childrens game of "I said" getting passed around the circle, going in "cat" and coming out "football" or something else even more twisted.
'Njoy
