I wanted to see how much difference there was between the two seating depths as well.
Seated Long= 59581 PSI
Seated Deep= 60646 PSI
Not really enough difference to worry over. Seated deep, feed and function is improved, so I elect to seat these bullets to the depth you see on the right side.
Wow, the decrease in pressure went from 67727 PSI with the 8 bands to 60646 PSI with the 4 band bullet, over 7000 PSI. This gives this load a very safe margin to work with. Not only that, but performance remained the same, maybe slightly better at 2195 fps.
While this is great, there are other factors to be taken into account. One of these is the fact of whether the bullet has enough gripping surface to remain in the case, without recoil causing it to move. In the case of the 50 B&M it the 3rd round down in the magazine did not move at all. In a magazine rifle, most of the time recoil will beat the bullet into the case, not so in the 50 B&M and this load without a crimp.
In the 500 MDM I put a good crimp below the top band kept the bullet from moving rearward in the magazine.
To make the bullet more versatile in other cartridges and rifles, we moved the three bands to the top of the bullet, and kept a bottom band in place to steer it as it left the muzzle........ This has now became standard for all the bullets in the Cutting Edge Safari line up.