earlthegoat2
Member
Unfortunately, not many folks know what you mean when you say “real +P”
I know. It's a shame. All for new cartridge sales they degrade and restrict once great well performing cartridges.Unfortunately, not many folks know what you mean when you say “real +P”
I know. It's a shame. All for new cartridge sales they degrade and restrict once great well performing cartridges.
I shot some Buffalo Bore 158 lhp from my 640 snubbie & got 1004 fps. That was 10 years ago. I also tested their 125 jhp & got 1245 fps from the same gun with the 1 7/8" barrel.I doubt +p 38 spl would go anywhere near 1,000 FPS from a 1 7/8 barrel. If it could be boosted to even 900 FPS, I suspect the muzzle flash would blind the shooter. This is an ancient round used in ancient tech firearms. It is what it is and cannot be made to be more.
No I wouldn't. Those took fbi loads at 20-25k psi for yearsJust for the record, you wouldn't expect say something like a pencil barreled S&W M&P/Model 10 to get the hell beat out of it by feeding it 158gr/1000 FPS loads? What about a 642?
Why would a pencil barrel make a difference? That makes zero sense. I have never seen a revolver barrel go before a cylinder. Its obvious you have never done real gun or pressure testing.Just for the record, you wouldn't expect say something like a pencil barreled S&W M&P/Model 10 to get the hell beat out of it by feeding it 158gr/1000 FPS loads? What about a 642?
References are read in the lawsuit against sammi in the 70s or 80 from a few guys. Those guys who invented the 44 mag and 357 mag. Taffin and leignenbaugh(sp) and one other guy, his name slips my mind at the moment.I’ll admit my knowledge and experience is quite limited compared to many, but in the years I’ve been reading about firearm issues, I have always read that SAAMI standard for .38 Special +P was 18,500 PSI for quite a few years and only fairly recently was increased to the current 20,000 PSI. I have never come across any information that it was formerly 22,000 PSI and was recently reduced to 20,000 PSI. Is it possible for someone to cite a reference for that?
Why would a pencil barrel make a difference? That makes zero sense. I have never seen a revolver barrel go before a cylinder. Its obvious you have never done real gun or pressure testing..
Well now you know.I didn't realize I was dealing with an expert...
I mentioned the pencil barrel because that's the era of gun which I was picturing. Not that the thinner barrels themselves were somehow a problem with heavy loads.
It's always been my understanding that pushing .38special to near 9x19 velocities was hard on the K frame and even the K's made for .357 didn't handle it well. The Air Force specifically also had problems with model 14 revolvers not standing up to repeated use with 158gr FMJ when it was loaded hot. The 642 I mentioned because it's a lightly constructed gun with an aluminum frame.
It just seems to me that if it was no sweat for any .38 Special to run on that kind of ammo, the major ammo manufacturers wouldn't be able to get away with selling such poor performing defensive loads as they do.
Thanks. I have been working 70 hrs a week and just haven't had the time to pull up anything.View attachment 860813
there ya go. reference is the speer #11 and #14 manuals and 1993 saami data.
murf
View attachment 860813
there ya go. reference is the speer #11 and #14 manuals and 1993 saami data.
murf
I guess I don't understand what you are saying here. everyone here is talking about map (maximum average pressure) for the 38 special cartridge. all the numbers on the spreadsheet are map for the listed cartridge. for some reason, I can't find the map reference on it … my bad, i'll change that shortly.That's more an example of more accurate measuring methods. CUP can ONLY measure the peak pressure, not the pressure curve.
Are you referring to yourself ?Both of you guys realize your arguing with a ballistic designer/tester and commercial ammo manufacturer right?
I do commercial refrigeration. In all my free time and part time job I am a ballistics engineerAre you referring to yourself ?
I thought you were an HVAC guy.
Excellent!I do commercial refrigeration. In all my free time and part time job I am a ballistics engineer
I do commercial refrigeration. In all my free time and part time job I am a ballistics engineer
Pretty sure me working 20 or more hours a week and getting paid for it qualified it as a REAL jobOK- So you are a hobbyist just like a lot of other people. Some of us, however, actually do ballistics research for our REAL job.
Pretty sure me working 20 or more hours a week and getting paid for it qualified it as a REAL job
Develop/log load data for a specific company. Mostly I test, average, peak and log loads to requirements of stringed tests to be able to be published.I am curious- what do you do as a part-time paid ballistics engineer?
Develop/log load data for a specific company