Quote from: oafpatroll on May 08, 2024, 04:25 PM

Quote from: Krazong on May 08, 2024, 03:48 PMYip, about 1800 ft/sec seems to be the upper velocity limit of lead / PC bullets.
This is the velocity I get from my 357 Magnum rounds when firing out of my Rossi Puma lever action rifle.

I know a couple of guys who run 30 cal plain based PC bullets in AK and 300blk at above 2000 with good results and there are people on cast boolits who claim velocities of up to 2600. I intend testing out my 270 bullets uncheckecked and seeing where I can get them to as I find gas checks an irritation.

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You will find that 2200 fps is abouts the problems start velocity. I have also read that some guys are achieving closer to the 2600 than 2000 fps velocities, but no mention of longer distance accuracy.
Everything points to 2200 fps at the moment and it seems the larger the caliber the more achievable that higher velocity is.
It would seem that the heavy slower calibers get higher velocities, closer to original velocities than say a 223 would get. I have gathered by my own deductions that the bigger bore just seem better suited for PC and higher velocities. 

Die set up will fix incorrect die set up issues, you not going to fix head spacing with die set up - perhaps reduce its apparent resultant showings, but not much more.

Quote from: Ds J on May 05, 2024, 11:00 PMWhich cartridge/s went into history, was stopped from production, and was revived again?

Has that ever happened?

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Cartridges of the World
You really really need to order it from second hand books on the internet, like R300 to R600
Frank C Barnes, there is a year or two of reading on off and a lifetime of referring too in that book. There are many many such cartridges, especially in handgun and cowboy shooting. A few rifle cartridges are also only run once a year or even less often.

Quote from: Krazong on May 08, 2024, 03:48 PMYip, about 1800 ft/sec seems to be the upper velocity limit of lead / PC bullets.
This is the velocity I get from my 357 Magnum rounds when firing out of my Rossi Puma lever action rifle.

I know a couple of guys who run 30 cal plain based PC bullets in AK and 300blk at above 2000 with good results and there are people on cast boolits who claim velocities of up to 2600. I intend testing out my 270 bullets uncheckecked and seeing where I can get them to as I find gas checks an irritation.

Yip, about 1800 ft/sec seems to be the upper velocity limit of lead / PC bullets.
This is the velocity I get from my 357 Magnum rounds when firing out of my Rossi Puma lever action rifle.

Nice write-up. The couple of Russian AKMs that I have fondles over the years really impressed in terms of their fit and finish.

Quote from: Krazong on May 08, 2024, 01:39 PMMy "shake and bake" method did not go as planned.  I can coat them and load the bullets, fire them in my 9mmP and 762x39, but about 2/3 of them will keyhole over 10m range and will loose all accuracy.

I'm back to using plain old lubed cast lead in my 9mmP and 38Spl.  Velocities in my 357 Mag dictates a copper jacketed or plated bullet.

Interesting. I shake and bake and have had unchecked bullets up to 1800fps with no leading and no keyholing. If they are sized appropriately I can't think why PC bullets would be more inclined to tumbling than traditionally lubed.

I did find that a change from MS200 to S121 caused me some tumbling on 9mmP pellets but I resolved that by bumping the charge a bit.

Setting up the sizing die according to the above procedure eliminated the cracked cases I got from my 7x57mm and increased accuracy.

My "shake and bake" method did not go as planned.  I can coat them and load the bullets, fire them in my 9mmP and 762x39, but about 2/3 of them will keyhole over 10m range and will loose all accuracy.

I'm back to using plain old lubed cast lead in my 9mmP and 38Spl.  Velocities in my 357 Mag dictates a copper jacketed or plated bullet.

Looking at the 7x57mm Mauser, it never really went out of production, but it did stop becoming a military cartridge back in the early 1900's when it was replaced by the 8mm Mauser.

It is still a very popular cartridge even today.