Unclenick, that is a very interesting online calculator and I thank you for the link.
It has a check box for 'moly coated' copper-jacketed lead bullets, and with all inputs held constant except for that check box, it shows a significant drop in peak pressure, along with a modest drop in muzzle velocity, for moly coated bullets.
Acknowledging that it is a model, not an empirical test, it still seems illuminating about why I'm seeing no "pressure signs" at powder charges very close to book max (or maybe a little over, depending on the book) for some of the loads I've been trying, even in hot weather.
I will not let it lull me into overconfidence or any extravagant overloads, but it is nice to have some apparent explanation for my good luck so far.
It has a check box for 'moly coated' copper-jacketed lead bullets, and with all inputs held constant except for that check box, it shows a significant drop in peak pressure, along with a modest drop in muzzle velocity, for moly coated bullets.
Acknowledging that it is a model, not an empirical test, it still seems illuminating about why I'm seeing no "pressure signs" at powder charges very close to book max (or maybe a little over, depending on the book) for some of the loads I've been trying, even in hot weather.
I will not let it lull me into overconfidence or any extravagant overloads, but it is nice to have some apparent explanation for my good luck so far.