06-13-2022, 12:53 AM
I personally make dummy cases if Im loading a new bullet I havent done before.
Ill take a de-primed and re-sized case, seat a bullet in it to the maximum magazine-length allowable COL, color the ogive with black marker, and see if that seats with a light seat into the chamber (not trying to force it into the chamber).
I then remove that dummy cartridge and see where the rifling marks are, if any.
Ill measure with calipers any visible land engagement marks on the colored ogive, then seat the bullet a bit deeper than that, then double-check that the dummy cartridge chambers and drops free from the chamber with gravity.
Thats just what I like to do because it feels more practical to me.
Others like to use the bullet seating depth gauge, which is how I learned, but variances in how that process works steered me away from it.
I have a boat load of older PPU brass that uses LRPs, which I have no intent to use for loading, so I use them for dummy cartridges with various bullets already seated in them I can reference when I go to load them again.
Ill take a de-primed and re-sized case, seat a bullet in it to the maximum magazine-length allowable COL, color the ogive with black marker, and see if that seats with a light seat into the chamber (not trying to force it into the chamber).
I then remove that dummy cartridge and see where the rifling marks are, if any.
Ill measure with calipers any visible land engagement marks on the colored ogive, then seat the bullet a bit deeper than that, then double-check that the dummy cartridge chambers and drops free from the chamber with gravity.
Thats just what I like to do because it feels more practical to me.
Others like to use the bullet seating depth gauge, which is how I learned, but variances in how that process works steered me away from it.
I have a boat load of older PPU brass that uses LRPs, which I have no intent to use for loading, so I use them for dummy cartridges with various bullets already seated in them I can reference when I go to load them again.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
