The biggest difference between a cup/core bullet, like the eldx, and a mono, like 90 cx, is that the mono is less compressible during the firing, it takes more force to score it with the grooves so chamber pressure goes up a lot compared to the cup/core. Now you would think that this higher pressure would also translate to higher MV, and some of the pressure probably goes there, but (and this is more my theory than seeing it in the literature), the mono has a higher friction factor, so some of the pressure energy is translated to barrel temperature (heat up).
The engraving pressure/higher chamber pressure is why the mfrs with both bullets on a load data sheet always have a caveat about the mono to start low and be careful in working it up.
idjits like that CA guv-who-would-be-kink have totally ruined what was a great state.
Sorry for the rant. well no not really!!!
The engraving pressure/higher chamber pressure is why the mfrs with both bullets on a load data sheet always have a caveat about the mono to start low and be careful in working it up.
idjits like that CA guv-who-would-be-kink have totally ruined what was a great state.
Sorry for the rant. well no not really!!!