3200 fps 260gr AB in a 23" 375 Ruger = bullsheeeet
The World of Cartridges and Compromises........
- Thread starter c-fbmi
- Start date
3200 fps 260gr AB in a 23" 375 Ruger = bullsheeeet
I happen to have 2 model 35P Oehler chronographs and have run his load through both on more than one occasion. Of course you're one of the nay sayers about the 9.3 as well as I recall, but then went awfully quiet when Ted (Why Not?) said he actually witnessed it at the range with the former owners loads. Seems to me you said that was not possible and your precious "Quickload" was again your back up. Well I don't get my ballistics from a computer, I get them from actually loading and shooting these loads over two of the worlds most accurate chronographs available. I can't say that my African will do the same, maybe his has a very fast barrel and mine doesn't, I know his identical 300 RUM will take 3 more grains of the same powder in the same load than mine will..........individual rifles have individual characteristics.........Besides, I don't really give a rat's ass what you think you know, I know my loads are within the bounds imposed by the brass case and my chronographs are as accurate as is possible with the technology used. I trust them and every load I have run through them has fallen within the expected velocities......unlike several Chronys I have used, and most likely what you rely on...........
- Location
- Somewhere on the Hudson Bay Coast
it says his Oehler is a POSor he be dead
Quickload works well enough with standard cartridges, normal bullet weights, and 4895, but becomes less and less reliable the further you stray from that standard. I ####canned mine when I discovered that I could make load predictions based on my own experience more safely without it. The discovery involved tweezers and a bright light to pull carbon, brass, and steel out of my eye, and the loss of a $5K rifle. I'd shoot Douglas's loads with confidence any day of the week . . . in fact I have.
- Location
- Somewhere on the Hudson Bay Coast
When QL is fed correct info, it usually is within 20 fps of prediciton. Measured via doppler radar. Velocity is pressure. I wouldn't want to be at the next bench over at the range when CMBIF is testing loads, that is for sure
Except that the program does not take case volume into account when compressed loads of slow burning propellants like Retumbo and R-25 are used. So not only have I stopped using Quickload, I've also stopped using loads that exceed 100% loading density.
X2, couldn't agree more !
While I am not an "experienced" reloader, I have never seen pressure signs from max loads listed by any of the companies you mentioned..... I wager the lawyer is as valuable as the computer.......
I am no CFBMI, and have no desire to start seeing pressure signs, and more than happy to stay within the lawyer load parameters...... But I have no doubt that if he says he attained that velocity, he attained that velocity......
It's not like he has anything to prove..... Lol
They work those loads up using sophisticated equipment that can measure the actual pressure generated in the chamber. No, not a simulation, but, a measurement.
"Traditional" pressure signs usually don't start appearing until you hit 70 000 PSI according to expert who have tested loads using pressure testing equipment. Beyond SAAMI pressure.
I'm also certain that CFBMI gets those velocities but I'm also certain that the laws of physics don't bend around Creston. He's an experienced reloader and a big boy so he can do whatever he wants.
Yes, I'm aware of that.
They've been doing that for a hundred years.
Actually, when Mauser developed their 98 action in 1998, they designed it to with stand 100,000 pounds pressure, just for safety sake.
Another fact is the early reloading charts usually show heavier loadings than do the modern loading charts, as a result of fear of being sued.
The first chart I looked at when I wanted to reload the 30-30, showed 33 grains of 3031 powder with a 170 grain bullet. I used that load and have often used it since then, for loading 30-30 rifles.
I have a little loading booklet by du Pont powder, marked "New Addition," on the cover. In it is shown 32 grains of 3031 powder for a 30-30 with 170 grain bullets.
Modern charts are often in the 28/29 grain range of 3031 for 170 grain bullets.
So, do all these high tech engineers at the powder companies show reloading charges designed to be at the top safety level for the cartridge shown?
If you believe that, I've got some ocean front land in Saskatchewan to sell you.
sure it does. I suspect you never used QL long enough to learn the ins and outs of the program
You can get into real trouble using faster burn rate powders that are below 100% density. Id imagine most of cbfi's loads are over 100% load density
could be that they reduce the pressure/charge weight in anticipation of a guy loading shells for a 120 year old lever action
That is not what I was implying. I have reloading books old and new and know how the lawyers have crept into the modern books.
The American gun writer, John Barsness, has said several times that the change to more conservative loading data came at the time when powder companies updates their data using pressure testing instrument instead of using "traditional" pressure indicators (flat primer, ejector marks, stiff bolt lift, case head expansion, etc...). That's when they realized that those signs sometime only start to appear at 70 000 PSI with no previous pressure signs. Lawyers are often blamed for those changes. Although I'm sure there's a built in safety buffer.
